diff --git a/data b/data
index 8ad5e916..9e27e420 160000
--- a/data
+++ b/data
@@ -1 +1 @@
-Subproject commit 8ad5e916e353094242823f716ea45b3df2cdfe5f
+Subproject commit 9e27e420d8b3c0619f148fa2c7b254b51338c5d1
diff --git a/src/app/app.cpp b/src/app/app.cpp
index 802eb9bf..cae2352e 100644
--- a/src/app/app.cpp
+++ b/src/app/app.cpp
@@ -1423,7 +1423,7 @@ Event CApplication::CreateVirtualEvent(const Event& sourceEvent)
     if ((sourceEvent.type == EVENT_KEY_DOWN) || (sourceEvent.type == EVENT_KEY_UP))
     {
         auto sourceData = sourceEvent.GetData<KeyEventData>();
-        auto virtualKey = GetVirtualKey(sourceData->key);
+        auto virtualKey = GetVirtualKey(sourceData->key, sourceEvent.kmodState);
 
         if (virtualKey == sourceData->key)
         {
diff --git a/src/common/font_loader.cpp b/src/common/font_loader.cpp
index 068ec746..9cb3eaeb 100644
--- a/src/common/font_loader.cpp
+++ b/src/common/font_loader.cpp
@@ -38,31 +38,6 @@
 
 namespace bp = boost::property_tree;
 
-const std::map<Gfx::FontType, std::string> DEFAULT_FONT =
-{
-    { Gfx::FONT_COMMON, "dvu_sans.ttf" },
-    { Gfx::FONT_COMMON_BOLD, "dvu_sans_bold.ttf" },
-    { Gfx::FONT_COMMON_ITALIC, "dvu_sans_italic.ttf" },
-    { Gfx::FONT_STUDIO, "dvu_sans_mono.ttf" },
-    { Gfx::FONT_STUDIO_BOLD, "dvu_sans_mono_bold.ttf" },
-    { Gfx::FONT_STUDIO_ITALIC, "dvu_sans_mono.ttf" }, //placeholder for future use, DejaVu Sans Mono doesn't have italic variant
-    { Gfx::FONT_SATCOM, "dvu_sans.ttf" },
-    { Gfx::FONT_SATCOM_BOLD, "dvu_sans_bold.ttf" },
-    { Gfx::FONT_SATCOM_ITALIC, "dvu_sans_italic.ttf" },
-};
-
-const std::map<Gfx::FontType, std::string> FONT_TYPE =
-{
-    { Gfx::FONT_COMMON, "FontCommon" },
-    { Gfx::FONT_COMMON_BOLD, "FontCommonBold" },
-    { Gfx::FONT_COMMON_ITALIC, "FontCommonItalic" },
-    { Gfx::FONT_STUDIO, "FontStudio" },
-    { Gfx::FONT_STUDIO_BOLD, "FontStudioBold" },
-    { Gfx::FONT_STUDIO_ITALIC, "FontStudioItalic" },
-    { Gfx::FONT_SATCOM, "FontSatCom" },
-    { Gfx::FONT_SATCOM_BOLD, "FontSatComBold" },
-    { Gfx::FONT_SATCOM_ITALIC, "FontSatComItalic" },
-};
 
 CFontLoader::CFontLoader()
 {
@@ -99,17 +74,10 @@ bool CFontLoader::Init()
     return true;
 }
 
-std::string CFontLoader::GetFont(Gfx::FontType type)
+std::optional<std::string> CFontLoader::GetFont(Gfx::FontType type) const
 {
-    return std::string("/fonts/") + m_propertyTree.get<std::string>(GetFontType(type), GetDefaultFont(type));
-}
-
-std::string CFontLoader::GetDefaultFont(Gfx::FontType type) const
-{
-    return DEFAULT_FONT.at(type);
-}
-
-std::string CFontLoader::GetFontType(Gfx::FontType type) const
-{
-    return FONT_TYPE.at(type);
+    auto font = m_propertyTree.get_optional<std::string>(ToString(type));
+    if (font)
+        return std::string("/fonts/") + *font;
+    return std::nullopt;
 }
diff --git a/src/common/font_loader.h b/src/common/font_loader.h
index 8f853a90..644ed98e 100644
--- a/src/common/font_loader.h
+++ b/src/common/font_loader.h
@@ -31,6 +31,7 @@
 #include <boost/property_tree/ptree.hpp>
 
 #include <string>
+#include <optional>
 
 /**
 * \class CFontLoader
@@ -50,22 +51,10 @@ public:
     */
     bool Init();
 
-    /** Reads given font from file
-    * \return return path to font file
+    /** Reads given font path from file
+    * \return return path to font file if font type is configured
     */
-    std::string GetFont(Gfx::FontType type);
-
-    /** Const type method to read filenames of fonts from defaultFont map
-    * used as a fallback if it wasn't possible to read font from fonts.ini
-    * \return return filename of default path
-    */
-    std::string GetDefaultFont(Gfx::FontType type) const;
-
-    /** Const type method converting Gfx::FontType to string
-    * \return return id of font used in fonts.ini file
-    */
-
-    std::string GetFontType(Gfx::FontType type) const;
+    std::optional<std::string> GetFont(Gfx::FontType type) const;
 
 private:
     boost::property_tree::ptree m_propertyTree;
diff --git a/src/common/key.cpp b/src/common/key.cpp
index 81fd4610..e037766c 100644
--- a/src/common/key.cpp
+++ b/src/common/key.cpp
@@ -19,7 +19,7 @@
 
 #include "common/key.h"
 
-unsigned int GetVirtualKey(unsigned int key)
+unsigned int GetVirtualKey(unsigned int key, unsigned int kmodState)
 {
     if(key == KEY(LCTRL) || key == KEY(RCTRL))
         return VIRTUAL_KMOD(CTRL);
@@ -33,5 +33,26 @@ unsigned int GetVirtualKey(unsigned int key)
     if(key == KEY(KP_ENTER))
         return KEY(RETURN);
 
+    // Remap keypad navigation keys as a workaround for the SDL issue: https://github.com/libsdl-org/SDL/issues/1766
+    if ((kmodState & KEY_MOD(NUM)) == 0)
+    {
+        if(key == KEY(KP_7))
+            return KEY(HOME);
+        if(key == KEY(KP_1))
+            return KEY(END);
+        if(key == KEY(KP_9))
+            return KEY(PAGEUP);
+        if(key == KEY(KP_3))
+            return KEY(PAGEDOWN);
+        if(key == KEY(KP_4))
+            return KEY(LEFT);
+        if(key == KEY(KP_6))
+            return KEY(RIGHT);
+        if(key == KEY(KP_8))
+            return KEY(UP);
+        if(key == KEY(KP_2))
+            return KEY(DOWN);
+    }
+
     return key;
 }
diff --git a/src/common/key.h b/src/common/key.h
index 57bbd457..2b972321 100644
--- a/src/common/key.h
+++ b/src/common/key.h
@@ -62,7 +62,7 @@ enum VirtualKmod
 #define VIRTUAL_KMOD(x) VIRTUAL_KMOD_ ## x
 
 //! Converts individual codes to virtual keys if needed
-unsigned int GetVirtualKey(unsigned int key);
+unsigned int GetVirtualKey(unsigned int key, unsigned int kmodState);
 
 // Virtual key code generated on joystick button presses
 // num is number of joystick button
diff --git a/src/common/stringutils.cpp b/src/common/stringutils.cpp
index 660cd7b6..626c5c39 100644
--- a/src/common/stringutils.cpp
+++ b/src/common/stringutils.cpp
@@ -156,11 +156,17 @@ std::wstring StrUtils::Utf8StringToUnicode(const std::string &str)
 {
     std::wstring result;
     unsigned int pos = 0;
+    int len;
     while (pos < str.size())
     {
-        int len = StrUtils::Utf8CharSizeAt(str, pos);
-        if (len == 0)
+        try
+        {
+            len = StrUtils::Utf8CharSizeAt(str, pos);
+        }
+        catch (std::out_of_range &e)
+        {
             break;
+        }
 
         std::string ch = str.substr(pos, len);
         result += static_cast<wchar_t>(StrUtils::Utf8CharToUnicode(ch));
@@ -172,21 +178,24 @@ std::wstring StrUtils::Utf8StringToUnicode(const std::string &str)
 int StrUtils::Utf8CharSizeAt(const std::string &str, unsigned int pos)
 {
     if (pos >= str.size())
-        return 0;
+        throw std::out_of_range("Index is greater than size");
 
     const char c = str[pos];
-    if((c & 0xF8) == 0xF0)
-        return 4;
-    if((c & 0xF0) == 0xE0)
-        return 3;
-    if((c & 0xE0) == 0xC0)
+    if((c & 0b1000'0000) == 0b0000'0000)
+        return 1;
+    if((c & 0b1110'0000) == 0b1100'0000)
         return 2;
+    if((c & 0b1111'0000) == 0b1110'0000)
+        return 3;
+    if((c & 0b1111'1000) == 0b1111'0000)
+        return 4;
 
     // Invalid char - unexpected continuation byte
-    if((c & 0xC0) == 0x80)
+    if (isUtf8ContinuationByte(c))
         throw std::invalid_argument("Unexpected UTF-8 continuation byte");
 
-    return 1;
+    // (c & 0b1111'1000) == 0b1111'1000 is true here
+    throw std::invalid_argument("Byte value has no sense in UTF-8");
 }
 
 std::size_t StrUtils::Utf8StringLength(const std::string &str)
@@ -201,3 +210,7 @@ std::size_t StrUtils::Utf8StringLength(const std::string &str)
     return result;
 }
 
+bool StrUtils::isUtf8ContinuationByte(char c)
+{
+    return (c & 0b1100'0000) == 0b1000'0000;
+}
diff --git a/src/common/stringutils.h b/src/common/stringutils.h
index 815528c4..54c8a2a1 100644
--- a/src/common/stringutils.h
+++ b/src/common/stringutils.h
@@ -87,5 +87,8 @@ int Utf8CharSizeAt(const std::string &str, unsigned int pos);
 //! Returns the length in characters of UTF-8 string \a str
 std::size_t Utf8StringLength(const std::string &str);
 
+//! Returns true if char is continuation UTF-8 byte
+bool isUtf8ContinuationByte(char c);
+
 } // namespace StrUtil
 
diff --git a/src/graphics/engine/pyro.cpp b/src/graphics/engine/pyro.cpp
index dc047c41..1d4a870d 100644
--- a/src/graphics/engine/pyro.cpp
+++ b/src/graphics/engine/pyro.cpp
@@ -26,6 +26,7 @@
 
 #include "graphics/core/triangle.h"
 
+#include "graphics/engine/engine.h"
 #include "graphics/engine/lightman.h"
 #include "graphics/engine/particle.h"
 #include "graphics/engine/terrain.h"
diff --git a/src/graphics/engine/text.cpp b/src/graphics/engine/text.cpp
index 87c2d9ff..38be55fd 100644
--- a/src/graphics/engine/text.cpp
+++ b/src/graphics/engine/text.cpp
@@ -85,6 +85,24 @@ struct CachedFont
         font = TTF_OpenFontRW(this->fontFile->GetHandler(), 0, pointSize);
     }
 
+    CachedFont(CachedFont&& other) noexcept
+        : fontFile{std::move(other.fontFile)},
+          font{std::exchange(other.font, nullptr)},
+          cache{std::move(other.cache)}
+    {
+    }
+
+    CachedFont& operator=(CachedFont&& other) noexcept
+    {
+        fontFile = std::move(other.fontFile);
+        std::swap(font, other.font);
+        cache = std::move(other.cache);
+        return *this;
+    }
+
+    CachedFont(const CachedFont& other) = delete;
+    CachedFont& operator=(const CachedFont& other) = delete;
+
     ~CachedFont()
     {
         if (font != nullptr)
@@ -92,11 +110,38 @@ struct CachedFont
     }
 };
 
+std::string ToString(FontType type)
+{
+    switch (type)
+    {
+        case FontType::FONT_COMMON:         return "FontCommon";
+        case FontType::FONT_COMMON_BOLD:    return "FontCommonBold";
+        case FontType::FONT_COMMON_ITALIC:  return "FontCommonItalic";
+        case FontType::FONT_STUDIO:         return "FontStudio";
+        case FontType::FONT_STUDIO_BOLD:    return "FontStudioBold";
+        case FontType::FONT_STUDIO_ITALIC:  return "FontStudioItalic";
+        case FontType::FONT_SATCOM:         return "FontSatCom";
+        case FontType::FONT_SATCOM_BOLD:    return "FontSatComBold";
+        case FontType::FONT_SATCOM_ITALIC:  return "FontSatComItalic";
+        case FontType::FONT_BUTTON:         return "FontButton";
+        default: throw std::invalid_argument("Unsupported value for Gfx::FontType -> std::string conversion: " + std::to_string(type));
+    }
+}
 
 namespace
 {
 constexpr glm::ivec2 REFERENCE_SIZE(800, 600);
 constexpr glm::ivec2 FONT_TEXTURE_SIZE(256, 256);
+
+Gfx::FontType ToBoldFontType(Gfx::FontType type)
+{
+    return static_cast<Gfx::FontType>(type | FONT_BOLD);
+}
+
+Gfx::FontType ToItalicFontType(Gfx::FontType type)
+{
+    return static_cast<Gfx::FontType>(type | FONT_ITALIC);
+}
 } // anonymous namespace
 
 /// The QuadBatch is responsible for collecting as many quad (aka rectangle) draws as possible and
@@ -169,6 +214,166 @@ private:
     TransparencyMode m_transparency = TransparencyMode::NONE;
 };
 
+class FontsCache
+{
+public:
+    using Fonts = std::map<FontType, std::unique_ptr<MultisizeFont>>;
+
+    FontsCache()
+    {
+        ClearLastCachedFont();
+    }
+
+    bool Reload(const CFontLoader& fontLoader, int pointSize)
+    {
+        Flush();
+        if (!PrepareCache(fontLoader)) { Flush(); return false; }
+        if (!LoadDefaultFonts(fontLoader, pointSize)) { Flush(); return false; }
+        return true;
+    }
+
+    CachedFont* GetOrOpenFont(FontType type, int pointSize)
+    {
+        if (IsLastCachedFont(type, pointSize))
+            return m_lastCachedFont;
+
+        auto multisizeFontIt = m_fonts.find(type);
+        if (multisizeFontIt == m_fonts.end())
+        {
+            m_error = std::string("Font type not found in cache: ") + ToString(type);
+            return nullptr;
+        }
+        MultisizeFont* multisizeFont = multisizeFontIt->second.get();
+
+        auto cachedFontIt = multisizeFont->fonts.find(pointSize);
+        if (cachedFontIt != multisizeFont->fonts.end())
+        {
+            auto* cachedFont = cachedFontIt->second.get();
+            SaveLastCachedFont(cachedFont, type, pointSize);
+            return m_lastCachedFont;
+        }
+
+        auto newFont = LoadFont(multisizeFont, pointSize);
+        if (!newFont) return nullptr;
+
+        SaveLastCachedFont(newFont.get(), type, pointSize);
+        multisizeFont->fonts[pointSize] = std::move(newFont);
+        return m_lastCachedFont;
+    }
+
+    void Flush()
+    {
+        Clear();
+        ClearLastCachedFont();
+    }
+
+    ~FontsCache()
+    {
+        Flush();
+    }
+
+    std::string GetError() const
+    {
+        return m_error;
+    }
+
+private:
+    bool PrepareCache(const CFontLoader& fontLoader)
+    {
+        for (auto type : {FONT_COMMON, FONT_STUDIO, FONT_SATCOM})
+        {
+            if (!PrepareCacheForFontType(type, fontLoader)) return false;
+            if (!PrepareCacheForFontType(ToBoldFontType(type), fontLoader)) return false;
+            if (!PrepareCacheForFontType(ToItalicFontType(type), fontLoader)) return false;
+        }
+        return true;
+    }
+
+    bool PrepareCacheForFontType(Gfx::FontType type, const CFontLoader& fontLoader)
+    {
+        if (auto font = fontLoader.GetFont(type))
+        {
+            m_fonts[type] = std::make_unique<MultisizeFont>(std::move(*font));
+            return true;
+        }
+        m_error = "Error on loading fonts: font type " + ToString(type) + " is not configured";
+        return false;
+    }
+
+    bool LoadDefaultFonts(const CFontLoader& fontLoader, int pointSize)
+    {
+        for (auto& font : m_fonts)
+        {
+            auto type = font.first;
+            auto* cachedFont = GetOrOpenFont(type, pointSize);
+            if (cachedFont == nullptr || cachedFont->font == nullptr)
+                return false;
+        }
+        return true;
+    }
+
+    std::unique_ptr<CachedFont> LoadFont(MultisizeFont* multisizeFont, int pointSize)
+    {
+        auto file = CResourceManager::GetSDLMemoryHandler(multisizeFont->fileName);
+        if (!file->IsOpen())
+        {
+            m_error = "Unable to open file '" + multisizeFont->fileName + "' (font size = " + std::to_string(pointSize) + ")";
+            return nullptr;
+        }
+        GetLogger()->Debug("Loaded font file %s (font size = %d)\n", multisizeFont->fileName.c_str(), pointSize);
+        auto newFont = std::make_unique<CachedFont>(std::move(file), pointSize);
+        if (newFont->font == nullptr)
+        {
+            m_error = std::string("TTF_OpenFont error ") + std::string(TTF_GetError());
+            return nullptr;
+        }
+        return newFont;
+    }
+
+    void SaveLastCachedFont(CachedFont* font, FontType type, int pointSize)
+    {
+        m_lastCachedFont = font;
+        m_lastFontType = type;
+        m_lastFontSize = pointSize;
+    }
+
+    bool IsLastCachedFont(FontType font, int pointSize) const
+    {
+        return
+            m_lastCachedFont != nullptr &&
+            m_lastFontType == font &&
+            m_lastFontSize == pointSize;
+    }
+
+    void Clear()
+    {
+        for (auto& [fontType, multisizeFont] : m_fonts)
+        {
+            for (auto& cachedFont : multisizeFont->fonts)
+            {
+                cachedFont.second->cache.clear();
+            }
+        }
+        m_fonts.clear();
+    }
+
+    void ClearLastCachedFont()
+    {
+        m_lastCachedFont = nullptr;
+        m_lastFontType = FONT_COMMON;
+        m_lastFontSize = 0;
+    }
+
+private:
+    Fonts m_fonts;
+
+    CachedFont* m_lastCachedFont;
+    FontType m_lastFontType;
+    int m_lastFontSize;
+
+    std::string m_error;
+};
+
 
 CText::CText(CEngine* engine)
 {
@@ -178,9 +383,7 @@ CText::CText(CEngine* engine)
     m_defaultSize = 12.0f;
     m_tabSize = 4;
 
-    m_lastFontType = FONT_COMMON;
-    m_lastFontSize = 0;
-    m_lastCachedFont = nullptr;
+    m_fontsCache = std::make_unique<FontsCache>();
 
     m_quadBatch = MakeUnique<CQuadBatch>(*engine);
 }
@@ -212,42 +415,24 @@ bool CText::ReloadFonts()
     CFontLoader fontLoader;
     if (!fontLoader.Init())
     {
-        GetLogger()->Debug("Error on parsing fonts config file: failed to open file\n");
+        m_error = "Error on parsing fonts config file: failed to open file";
+        return false;
     }
 
-    // Backup previous fonts
-    auto fonts = std::move(m_fonts);
-    m_fonts.clear();
-
-    for (auto type : {FONT_COMMON, FONT_STUDIO, FONT_SATCOM})
+    auto newCache = std::make_unique<FontsCache>();
+    if (!newCache->Reload(fontLoader, GetFontPointSize(m_defaultSize)))
     {
-        m_fonts[static_cast<Gfx::FontType>(type)] = MakeUnique<MultisizeFont>(fontLoader.GetFont(type));
-        m_fonts[static_cast<Gfx::FontType>(type|FONT_BOLD)] = MakeUnique<MultisizeFont>(fontLoader.GetFont(static_cast<Gfx::FontType>(type|FONT_BOLD)));
-        m_fonts[static_cast<Gfx::FontType>(type|FONT_ITALIC)] = MakeUnique<MultisizeFont>(fontLoader.GetFont(static_cast<Gfx::FontType>(type|FONT_ITALIC)));
-    }
-
-    for (auto it = m_fonts.begin(); it != m_fonts.end(); ++it)
-    {
-        FontType type = (*it).first;
-        CachedFont* cf = GetOrOpenFont(type, m_defaultSize);
-        if (cf == nullptr || cf->font == nullptr)
-        {
-            m_fonts = std::move(fonts);
-            return false;
-        }
+        m_error = newCache->GetError();
+        return false;
     }
 
+    m_fontsCache = std::move(newCache);
     return true;
 }
 
 void CText::Destroy()
 {
-    m_fonts.clear();
-
-    m_lastCachedFont = nullptr;
-    m_lastFontType = FONT_COMMON;
-    m_lastFontSize = 0;
-
+    m_fontsCache->Flush();
     TTF_Quit();
 }
 
@@ -271,17 +456,7 @@ void CText::FlushCache()
     }
     m_fontTextures.clear();
 
-    for (auto& multisizeFont : m_fonts)
-    {
-        for (auto& cachedFont : multisizeFont.second->fonts)
-        {
-            cachedFont.second->cache.clear();
-        }
-    }
-
-    m_lastCachedFont = nullptr;
-    m_lastFontType = FONT_COMMON;
-    m_lastFontSize = 0;
+    m_fontsCache->Flush();
 }
 
 int CText::GetTabSize()
@@ -938,7 +1113,14 @@ int CText::GetCharSizeAt(Gfx::FontType font, const std::string& text, unsigned i
     }
     else
     {
-        len = StrUtils::Utf8CharSizeAt(text, index);
+        try
+        {
+            len = StrUtils::Utf8CharSizeAt(text, index);
+        }
+        catch (std::invalid_argument &e)
+        {
+            len = 1;
+        }
     }
     return len;
 }
@@ -1098,54 +1280,21 @@ void CText::DrawCharAndAdjustPos(UTF8Char ch, FontType font, float size, glm::iv
     }
 }
 
-CachedFont* CText::GetOrOpenFont(FontType font, float size)
+int CText::GetFontPointSize(float size) const
 {
     glm::ivec2 windowSize = m_engine->GetWindowSize();
-    int pointSize = static_cast<int>(size * (glm::length(glm::vec2(windowSize)) / glm::length(glm::vec2(REFERENCE_SIZE))));
+    return static_cast<int>(size * (glm::length(glm::vec2(windowSize)) / glm::length(glm::vec2(REFERENCE_SIZE))));
+}
 
-    if (m_lastCachedFont != nullptr &&
-        m_lastFontType == font &&
-        m_lastFontSize == pointSize)
+CachedFont* CText::GetOrOpenFont(FontType type, float size)
+{
+    auto* cachedFont = m_fontsCache->GetOrOpenFont(type, GetFontPointSize(size));
+    if (!cachedFont)
     {
-        return m_lastCachedFont;
-    }
-
-    auto it = m_fonts.find(font);
-    if (it == m_fonts.end())
-    {
-        m_error = std::string("Invalid font type ") + StrUtils::ToString<int>(static_cast<int>(font));
+        m_error = m_fontsCache->GetError();
         return nullptr;
     }
-
-    MultisizeFont* mf = it->second.get();
-
-    auto jt = mf->fonts.find(pointSize);
-    if (jt != mf->fonts.end())
-    {
-        m_lastCachedFont = jt->second.get();
-        m_lastFontType = font;
-        m_lastFontSize = pointSize;
-        return m_lastCachedFont;
-    }
-
-    auto file = CResourceManager::GetSDLMemoryHandler(mf->fileName);
-    if (!file->IsOpen())
-    {
-        m_error = std::string("Unable to open file '") + mf->fileName + "' (font size = " + StrUtils::ToString<float>(size) + ")";
-        return nullptr;
-    }
-    GetLogger()->Debug("Loaded font file %s (font size = %.1f)\n", mf->fileName.c_str(), size);
-
-    auto newFont = MakeUnique<CachedFont>(std::move(file), pointSize);
-    if (newFont->font == nullptr)
-    {
-        m_error = std::string("TTF_OpenFont error ") + std::string(TTF_GetError());
-        return nullptr;
-    }
-
-    m_lastCachedFont = newFont.get();
-    mf->fonts[pointSize] = std::move(newFont);
-    return m_lastCachedFont;
+    return cachedFont;
 }
 
 CharTexture CText::GetCharTexture(UTF8Char ch, FontType font, float size)
diff --git a/src/graphics/engine/text.h b/src/graphics/engine/text.h
index 99c77258..6efd42b2 100644
--- a/src/graphics/engine/text.h
+++ b/src/graphics/engine/text.h
@@ -68,38 +68,40 @@ typedef short FontMetaChar;
  *
  * Bitmask in lower 4 bits (mask 0x00f)
  */
-enum FontType
+enum FontType : unsigned char
 {
     //! Flag for bold font subtype
-    FONT_BOLD       = 0x04,
+    FONT_BOLD       = 0b0000'01'00,
     //! Flag for italic font subtype
-    FONT_ITALIC     = 0x08,
+    FONT_ITALIC     = 0b0000'10'00,
 
     //! Default colobot font used for interface
-    FONT_COMMON    = 0x00,
+    FONT_COMMON    = 0b0000'00'00,
     //! Alias for bold colobot font
     FONT_COMMON_BOLD = FONT_COMMON | FONT_BOLD,
     //! Alias for italic colobot font
     FONT_COMMON_ITALIC = FONT_COMMON | FONT_ITALIC,
 
     //! Studio font used mainly in code editor
-    FONT_STUDIO    = 0x01,
+    FONT_STUDIO    = 0b0000'00'01,
     //! Alias for bold studio font
     FONT_STUDIO_BOLD = FONT_STUDIO | FONT_BOLD,
     //! Alias for italic studio font (at this point not used anywhere)
     FONT_STUDIO_ITALIC = FONT_STUDIO | FONT_ITALIC,
 
     //! SatCom font used for interface (currently bold and italic wariants aren't used anywhere)
-    FONT_SATCOM = 0x02,
+    FONT_SATCOM = 0b0000'00'10,
     //! Alias for bold satcom font
     FONT_SATCOM_BOLD = FONT_SATCOM | FONT_BOLD,
     //! Alias for italic satcom font
     FONT_SATCOM_ITALIC = FONT_SATCOM | FONT_ITALIC,
 
     //! Pseudo-font loaded from textures for buttons, icons, etc.
-    FONT_BUTTON     = 0x03,
+    FONT_BUTTON     = 0b0000'00'11,
 };
 
+std::string ToString(FontType);
+
 /**
  * \enum FontTitle
  * \brief Size of font title
@@ -203,6 +205,7 @@ struct CharTexture
 };
 
 // Definition is private - in text.cpp
+class FontsCache;
 struct CachedFont;
 struct MultisizeFont;
 struct FontTexture;
@@ -322,7 +325,8 @@ public:
     glm::ivec2 GetFontTextureSize();
 
 protected:
-    CachedFont* GetOrOpenFont(FontType font, float size);
+    int GetFontPointSize(float size) const;
+    CachedFont* GetOrOpenFont(FontType type, float size);
     CharTexture CreateCharTexture(UTF8Char ch, CachedFont* font);
     FontTexture* GetOrCreateFontTexture(const glm::ivec2& tileSize);
     FontTexture CreateFontTexture(const glm::ivec2& tileSize);
@@ -348,13 +352,9 @@ protected:
     float        m_defaultSize;
     int          m_tabSize;
 
-    std::map<FontType, std::unique_ptr<MultisizeFont>> m_fonts;
+    std::unique_ptr<FontsCache> m_fontsCache;
     std::vector<FontTexture> m_fontTextures;
 
-    FontType     m_lastFontType;
-    int          m_lastFontSize;
-    CachedFont*  m_lastCachedFont;
-
     class CQuadBatch;
     std::unique_ptr<CQuadBatch> m_quadBatch;
 };
diff --git a/src/level/parser/parserparam.cpp b/src/level/parser/parserparam.cpp
index 17694245..24001122 100644
--- a/src/level/parser/parserparam.cpp
+++ b/src/level/parser/parserparam.cpp
@@ -27,6 +27,8 @@
 
 #include "common/resources/resourcemanager.h"
 
+#include "graphics/engine/engine.h"
+
 #include "level/robotmain.h"
 #include "level/scoreboard.h"
 
diff --git a/src/object/auto/autojostle.cpp b/src/object/auto/autojostle.cpp
index 92293895..711b2558 100644
--- a/src/object/auto/autojostle.cpp
+++ b/src/object/auto/autojostle.cpp
@@ -22,6 +22,8 @@
 
 #include "object/old_object.h"
 
+#include "graphics/engine/engine.h"
+
 
 // Object's constructor.
 
diff --git a/src/object/auto/autonest.cpp b/src/object/auto/autonest.cpp
index ee725ee0..1a3386e6 100644
--- a/src/object/auto/autonest.cpp
+++ b/src/object/auto/autonest.cpp
@@ -22,6 +22,7 @@
 
 #include "common/make_unique.h"
 
+#include "graphics/engine/engine.h"
 #include "graphics/engine/terrain.h"
 
 #include "level/parser/parserline.h"
diff --git a/src/object/auto/autoroot.cpp b/src/object/auto/autoroot.cpp
index a13363f9..fad23cbf 100644
--- a/src/object/auto/autoroot.cpp
+++ b/src/object/auto/autoroot.cpp
@@ -20,6 +20,7 @@
 
 #include "object/auto/autoroot.h"
 
+#include "graphics/engine/engine.h"
 #include "graphics/engine/particle.h"
 #include "graphics/engine/terrain.h"
 
diff --git a/src/object/auto/autotower.cpp b/src/object/auto/autotower.cpp
index 4db5a2de..c3511266 100644
--- a/src/object/auto/autotower.cpp
+++ b/src/object/auto/autotower.cpp
@@ -22,6 +22,8 @@
 
 #include "common/make_unique.h"
 
+#include "graphics/engine/engine.h"
+
 #include "level/robotmain.h"
 
 #include "level/parser/parserline.h"
diff --git a/src/object/motion/motion.cpp b/src/object/motion/motion.cpp
index c839c085..c5bc22a8 100644
--- a/src/object/motion/motion.cpp
+++ b/src/object/motion/motion.cpp
@@ -24,6 +24,8 @@
 
 #include "common/make_unique.h"
 
+#include "graphics/engine/engine.h"
+
 #include "level/robotmain.h"
 
 #include "level/parser/parserline.h"
diff --git a/src/object/motion/motionhuman.cpp b/src/object/motion/motionhuman.cpp
index 4e69cb32..858a2a75 100644
--- a/src/object/motion/motionhuman.cpp
+++ b/src/object/motion/motionhuman.cpp
@@ -22,6 +22,7 @@
 
 #include "app/app.h"
 
+#include "graphics/engine/engine.h"
 #include "graphics/engine/oldmodelmanager.h"
 #include "graphics/engine/terrain.h"
 #include "graphics/engine/water.h"
diff --git a/src/object/motion/motionvehicle.cpp b/src/object/motion/motionvehicle.cpp
index 180b11f7..2c760b4a 100644
--- a/src/object/motion/motionvehicle.cpp
+++ b/src/object/motion/motionvehicle.cpp
@@ -24,6 +24,7 @@
 
 #include "common/stringutils.h"
 
+#include "graphics/engine/engine.h"
 #include "graphics/engine/oldmodelmanager.h"
 #include "graphics/engine/particle.h"
 #include "graphics/engine/terrain.h"
diff --git a/src/object/motion/motionworm.cpp b/src/object/motion/motionworm.cpp
index d1efdd55..ef52eee8 100644
--- a/src/object/motion/motionworm.cpp
+++ b/src/object/motion/motionworm.cpp
@@ -22,6 +22,7 @@
 
 #include "app/app.h"
 
+#include "graphics/engine/engine.h"
 #include "graphics/engine/oldmodelmanager.h"
 #include "graphics/engine/particle.h"
 #include "graphics/engine/terrain.h"
diff --git a/src/script/scriptfunc.cpp b/src/script/scriptfunc.cpp
index e8d0077b..c0f0c380 100644
--- a/src/script/scriptfunc.cpp
+++ b/src/script/scriptfunc.cpp
@@ -1544,7 +1544,7 @@ bool CScriptFunctions::rDeflag(CBotVar* var, CBotVar* result, int& exception, vo
     return WaitForForegroundTask(script, result, exception);
 }
 
-// Compilation of the instruction "produce(pos, angle, type[, scriptName[, power]])"
+// Compilation of the instruction "produce(pos, angle, type[, scriptName[, power[, team]]])"
 // or "produce(type[, power])".
 
 CBotTypResult CScriptFunctions::cProduce(CBotVar* &var, void* user)
@@ -1584,6 +1584,12 @@ CBotTypResult CScriptFunctions::cProduce(CBotVar* &var, void* user)
             {
                 if ( var->GetType() > CBotTypDouble )  return CBotTypResult(CBotErrBadNum);
                 var = var->GetNext();
+
+                if ( var != nullptr )
+                {
+                    if ( var->GetType() > CBotTypDouble )  return CBotTypResult(CBotErrBadNum);
+                    var = var->GetNext();
+                }
             }
         }
     }
@@ -1593,7 +1599,7 @@ CBotTypResult CScriptFunctions::cProduce(CBotVar* &var, void* user)
     return CBotTypResult(CBotTypFloat);
 }
 
-// Instruction "produce(pos, angle, type[, scriptName[, power]])"
+// Instruction "produce(pos, angle, type[, scriptName[, power[, team]]])"
 // or "produce(type[, power])".
 
 bool CScriptFunctions::rProduce(CBotVar* var, CBotVar* result, int& exception, void* user)
@@ -1601,34 +1607,36 @@ bool CScriptFunctions::rProduce(CBotVar* var, CBotVar* result, int& exception, v
     CScript*    script = static_cast<CScript*>(user);
     CObject*    me = script->m_object;
     std::string name = "";
-    glm::vec3 pos;
-    float       angle = 0.0f;
-    ObjectType  type = OBJECT_NULL;
-    float       power = 0.0f;
+
+    ObjectCreateParams params;
+    params.angle = 0.0f;
+    params.type = OBJECT_NULL;
+    params.power = 0.0f;
+    params.team = 0;
 
     if ( var->GetType() <= CBotTypDouble )
     {
-        type = static_cast<ObjectType>(var->GetValInt());
+        params.type = static_cast<ObjectType>(var->GetValInt());
         var = var->GetNext();
 
-        pos = me->GetPosition();
+        params.pos = me->GetPosition();
 
         glm::vec3 rotation = me->GetRotation() + me->GetTilt();
-        angle = rotation.y;
+        params.angle = rotation.y;
 
         if ( var != nullptr )
-            power = var->GetValFloat();
+            params.power = var->GetValFloat();
         else
-            power = -1.0f;
+            params.power = -1.0f;
     }
     else
     {
-        if ( !GetPoint(var, exception, pos) )  return true;
+        if ( !GetPoint(var, exception, params.pos) )  return true;
 
-        angle = var->GetValFloat()*Math::PI/180.0f;
+        params.angle = var->GetValFloat()*Math::PI/180.0f;
         var = var->GetNext();
 
-        type = static_cast<ObjectType>(var->GetValInt());
+        params.type = static_cast<ObjectType>(var->GetValInt());
         var = var->GetNext();
 
         if ( var != nullptr )
@@ -1637,28 +1645,34 @@ bool CScriptFunctions::rProduce(CBotVar* var, CBotVar* result, int& exception, v
             var = var->GetNext();
             if ( var != nullptr )
             {
-                power = var->GetValFloat();
+                params.power = var->GetValFloat();
+                var = var->GetNext();
+                if ( var != nullptr )
+                {
+                    params.team = var->GetValInt();
+                }
             }
             else
             {
-                power = -1.0f;
+                params.power = -1.0f;
             }
         }
         else
         {
-            power = -1.0f;
+            params.power = -1.0f;
         }
     }
 
     CObject* object = nullptr;
 
-    if ( type == OBJECT_ANT    ||
-        type == OBJECT_SPIDER ||
-        type == OBJECT_BEE    ||
-        type == OBJECT_WORM   )
+    if ( params.type == OBJECT_ANT    ||
+        params.type == OBJECT_SPIDER ||
+        params.type == OBJECT_BEE    ||
+        params.type == OBJECT_WORM   )
     {
-        object = CObjectManager::GetInstancePointer()->CreateObject(pos, angle, type);
-        CObjectManager::GetInstancePointer()->CreateObject(pos, angle, OBJECT_EGG);
+        object = CObjectManager::GetInstancePointer()->CreateObject(params);
+        params.type = OBJECT_EGG;
+        CObjectManager::GetInstancePointer()->CreateObject(params);
         if (object->Implements(ObjectInterfaceType::Programmable))
         {
             dynamic_cast<CProgrammableObject&>(*object).SetActivity(false);
@@ -1666,21 +1680,21 @@ bool CScriptFunctions::rProduce(CBotVar* var, CBotVar* result, int& exception, v
     }
     else
     {
-        if ((type == OBJECT_POWER || type == OBJECT_ATOMIC) && power == -1.0f)
+        if ((params.type == OBJECT_POWER || params.type == OBJECT_ATOMIC) && params.power == -1.0f)
         {
-            power = 1.0f;
+            params.power = 1.0f;
         }
-        bool exists = IsValidObjectTypeId(type) && type != OBJECT_NULL && type != OBJECT_MAX && type != OBJECT_MOBILEpr;
+        bool exists = IsValidObjectTypeId(params.type) && params.type != OBJECT_NULL && params.type != OBJECT_MAX && params.type != OBJECT_MOBILEpr;
         if (exists)
         {
-            object = CObjectManager::GetInstancePointer()->CreateObject(pos, angle, type, power);
+            object = CObjectManager::GetInstancePointer()->CreateObject(params);
         }
         if (object == nullptr)
         {
             result->SetValInt(1);  // error
             return true;
         }
-        if (type == OBJECT_MOBILEdr)
+        if (params.type == OBJECT_MOBILEdr)
         {
             assert(object->Implements(ObjectInterfaceType::Old)); // TODO: temporary hack
             dynamic_cast<COldObject&>(*object).SetManual(true);
diff --git a/src/ui/controls/edit.cpp b/src/ui/controls/edit.cpp
index 9da4933d..8701c756 100644
--- a/src/ui/controls/edit.cpp
+++ b/src/ui/controls/edit.cpp
@@ -27,6 +27,7 @@
 
 #include "common/logger.h"
 #include "common/make_unique.h"
+#include "common/stringutils.h"
 
 #include "common/resources/inputstream.h"
 #include "common/resources/outputstream.h"
@@ -497,7 +498,10 @@ bool CEdit::EventProcess(const Event &event)
     if ( event.type == EVENT_TEXT_INPUT && !bControl && m_bFocus )
     {
         auto data = event.GetData<TextInputData>();
-        Insert(data->text[0]); // TODO: insert utf-8 char
+        for ( char c : data->text )
+        {
+            Insert(c);
+        }
         SendModifEvent();
         return true;
     }
@@ -2270,7 +2274,7 @@ void CEdit::MoveChar(int move, bool bWord, bool bSelect)
 {
     int     character;
 
-    if ( move == -1 )  // back?
+    if ( move == -1 )  // back
     {
         if ( bWord )
         {
@@ -2315,12 +2319,18 @@ void CEdit::MoveChar(int move, bool bWord, bool bSelect)
         }
         else
         {
-            m_cursor1 --;
-            if ( m_cursor1 < 0 )  m_cursor1 = 0;
+            if ( m_cursor1 > 0 )
+            {
+                m_cursor1 --;
+                while ( m_cursor1 > 0 && StrUtils::isUtf8ContinuationByte(m_text[m_cursor1]) )
+                {
+                    m_cursor1 --;
+                }
+            }
         }
     }
 
-    if ( move == 1 )  // advance?
+    if ( move == 1 )  // advance
     {
         if ( bWord )
         {
@@ -2365,8 +2375,14 @@ void CEdit::MoveChar(int move, bool bWord, bool bSelect)
         }
         else
         {
-            m_cursor1 ++;
-            if ( m_cursor1 > m_len )  m_cursor1 = m_len;
+            if ( m_cursor1 < m_len )
+            {
+                m_cursor1 ++;
+                while ( m_cursor1 < m_len && StrUtils::isUtf8ContinuationByte(m_text[m_cursor1]) )
+                {
+                    m_cursor1 ++;
+                }
+            }
         }
     }
 
@@ -2796,6 +2812,11 @@ void CEdit::DeleteOne(int dir)
     }
 
     if ( m_cursor1 > m_cursor2 )  Math::Swap(m_cursor1, m_cursor2);
+
+    // Expands selection to delete integer number of UTF-8 symbols
+    while ( m_cursor1 > 0     && StrUtils::isUtf8ContinuationByte(m_text[m_cursor1]) )  m_cursor1 --;
+    while ( m_cursor2 < m_len && StrUtils::isUtf8ContinuationByte(m_text[m_cursor2]) )  m_cursor2 ++;
+
     hole = m_cursor2-m_cursor1;
     end = m_len-hole;
     for ( i=m_cursor1 ; i<end ; i++ )
diff --git a/src/ui/controls/key.cpp b/src/ui/controls/key.cpp
index ae8b7843..3dd87ea8 100644
--- a/src/ui/controls/key.cpp
+++ b/src/ui/controls/key.cpp
@@ -79,7 +79,7 @@ bool CKey::EventProcess(const Event &event)
     if (event.type == EVENT_KEY_DOWN && m_catch)
     {
         m_catch = false;
-        unsigned int key = GetVirtualKey(event.GetData<KeyEventData>()->key);
+        unsigned int key = GetVirtualKey(event.GetData<KeyEventData>()->key, event.kmodState);
 
         if (TestKey(key)) // impossible ?
         {
diff --git a/src/ui/controls/list.cpp b/src/ui/controls/list.cpp
index 2554923f..553a2989 100644
--- a/src/ui/controls/list.cpp
+++ b/src/ui/controls/list.cpp
@@ -24,6 +24,7 @@
 
 #include "graphics/core/device.h"
 #include "graphics/core/renderers.h"
+#include "graphics/core/transparency.h"
 #include "graphics/engine/engine.h"
 
 #include "math/func.h"
diff --git a/src/ui/debug_menu.cpp b/src/ui/debug_menu.cpp
index 0cb3d178..39bb677a 100644
--- a/src/ui/debug_menu.cpp
+++ b/src/ui/debug_menu.cpp
@@ -24,6 +24,7 @@
 #include "common/event.h"
 #include "common/stringutils.h"
 
+#include "graphics/engine/engine.h"
 #include "graphics/engine/lightning.h"
 #include "graphics/engine/terrain.h"