diff --git a/src/fontcache.cpp b/src/fontcache.cpp
--- a/src/fontcache.cpp
+++ b/src/fontcache.cpp
@@ -347,9 +347,7 @@ static int CALLBACK EnumFontCallback(con
 
 	if (!found) return 1;
 
-	strecpy(info->settings->small_font,  font_name, lastof(info->settings->small_font));
-	strecpy(info->settings->medium_font, font_name, lastof(info->settings->medium_font));
-	strecpy(info->settings->large_font,  font_name, lastof(info->settings->large_font));
+	callback->SetFontNames(info->settings, font_name);
 	if (info->callback->FindMissingGlyphs(NULL)) return 1;
 	DEBUG(freetype, 1, "Fallback font: %s (%s)", font_name, english_name);
 	return 0; // stop enumerating
@@ -487,9 +485,7 @@ bool SetFallbackFont(FreeTypeSettings *s
 								strncmp(name, "GB18030 Bitmap", 14) == 0) continue;
 
 						/* Save result. */
-						strecpy(settings->small_font,  name, lastof(settings->small_font));
-						strecpy(settings->medium_font, name, lastof(settings->medium_font));
-						strecpy(settings->large_font,  name, lastof(settings->large_font));
+						callback->SetFontNames(settings, name);
 						DEBUG(freetype, 2, "CT-Font for %s: %s", language_isocode, name);
 						result = true;
 						break;
@@ -574,9 +570,7 @@ bool SetFallbackFont(FreeTypeSettings *s
 			name[act_len > 127 ? 127 : act_len] = '\0';
 
 			/* Save Result. */
-			strecpy(settings->small_font,  name, lastof(settings->small_font));
-			strecpy(settings->medium_font, name, lastof(settings->medium_font));
-			strecpy(settings->large_font,  name, lastof(settings->large_font));
+			callback->SetFontNames(settings, name);
 			DEBUG(freetype, 2, "ATSUI-Font for %s: %s", language_isocode, name);
 			result = true;
 		}
@@ -598,9 +592,7 @@ bool SetFallbackFont(FreeTypeSettings *s
 		/* Init FreeType if needed. */
 		if ((ft_init || FT_Init_FreeType(&_library) == FT_Err_Ok) && GetFontByFaceName("Arial Unicode MS", &face) == FT_Err_Ok) {
 			FT_Done_Face(face);
-			strecpy(settings->small_font,  "Arial Unicode MS", lastof(settings->small_font));
-			strecpy(settings->medium_font, "Arial Unicode MS", lastof(settings->medium_font));
-			strecpy(settings->large_font,  "Arial Unicode MS", lastof(settings->large_font));
+			callback->SetFontNames(settings, "Arial Unicode MS");
 			DEBUG(freetype, 1, "Replacing font 'Geeza Pro' with 'Arial Unicode MS'");
 		}
 		if (!ft_init) {
@@ -719,9 +711,7 @@ bool SetFallbackFont(FreeTypeSettings *s
 				continue;
 			}
 
-			strecpy(settings->small_font,  (const char*)file, lastof(settings->small_font));
-			strecpy(settings->medium_font, (const char*)file, lastof(settings->medium_font));
-			strecpy(settings->large_font,  (const char*)file, lastof(settings->large_font));
+			callback->SetFontNames(settings, (const char*)file);
 
 			bool missing = callback->FindMissingGlyphs(NULL);
 			DEBUG(freetype, 1, "Font \"%s\" misses%s glyphs", file, missing ? "" : " no");
diff --git a/src/strings.cpp b/src/strings.cpp
--- a/src/strings.cpp
+++ b/src/strings.cpp
@@ -1798,12 +1798,12 @@ class LanguagePackGlyphSearcher : public
 		this->j = 0;
 	}
 
-	FontSize DefaultSize()
+	/* virtual */ FontSize DefaultSize()
 	{
 		return FS_NORMAL;
 	}
 
-	const char *NextString()
+	/* virtual */ const char *NextString()
 	{
 		if (this->i >= 32) return NULL;
 
@@ -1817,6 +1817,13 @@ class LanguagePackGlyphSearcher : public
 
 		return ret;
 	}
+
+	/* virtual */ void SetFontNames(FreeTypeSettings *settings, const char *font_name)
+	{
+		strecpy(settings->small_font,  font_name, lastof(settings->small_font));
+		strecpy(settings->medium_font, font_name, lastof(settings->medium_font));
+		strecpy(settings->large_font,  font_name, lastof(settings->large_font));
+	}
 };
 
 /**
diff --git a/src/strings_func.h b/src/strings_func.h
--- a/src/strings_func.h
+++ b/src/strings_func.h
@@ -222,6 +222,13 @@ public:
 	 */
 	virtual void Reset() = 0;
 
+	/**
+	 * Set the right font names.
+	 * @param settings  The settings to modify.
+	 * @param font_name The new font name.
+	 */
+	virtual void SetFontNames(struct FreeTypeSettings *settings, const char *font_name) = 0;
+
 	bool FindMissingGlyphs(const char **str);
 };