- added German Umlauts for the BigFont and fixed the character substitution logic.

For pure uppercase fonts it makes no sense to try a lowercase substitution as a first step.

src/gamedata/fonts/font.cpp

@@ -708,6 +708,33 @@ int FFont::GetCharCode(int code, bool needpic) const
 		return code;
 	}
 
+	// Use different substitution logic based on the fonts content:
+	// In a font which has both upper and lower case, prefer unaccented small characters over capital ones.
+	// In a pure upper-case font, do not check for lower case replacements.
+	if (!MixedCase)
+	{
+		// Try converting lowercase characters to uppercase.
+		if (myislower(code))
+		{
+			code = upperforlower[code];
+			if (code >= FirstChar && code <= LastChar && (!needpic || Chars[code - FirstChar].TranslatedPic != nullptr))
+			{
+				return code;
+			}
+		}
+		// Try stripping accents from accented characters.
+		int newcode = stripaccent(code);
+		if (newcode != code)
+		{
+			code = newcode;
+			if (code >= FirstChar && code <= LastChar && (!needpic || Chars[code - FirstChar].TranslatedPic != nullptr))
+			{
+				return code;
+			}
+		}
+	}
+	else
+	{
 		int originalcode = code;
 		int newcode;
 
@@ -727,6 +754,7 @@ int FFont::GetCharCode(int code, bool needpic) const
 			// Stripping accents did not help - now try uppercase for lowercase
 			if (upper != code) return GetCharCode(upper, needpic);
 		}
+	}
 
 	return -1;
 }

src/gamedata/fonts/v_font.h

@@ -126,6 +126,7 @@ protected:
 	char Cursor;
 	bool noTranslate;
 	bool translateUntranslated;
+	bool MixedCase = false;
 	struct CharData
 	{
 		FTexture *TranslatedPic = nullptr;	// Texture for use with font translations.