diff --git a/src/strings_type.h b/src/strings_type.h
new file mode 100644
--- /dev/null
+++ b/src/strings_type.h
@@ -0,0 +1,89 @@
+/* $Id$ */
+
+/** @file strings_type.h Types related to strings. */
+
+#ifndef STRINGS_TYPE_H
+#define STRINGS_TYPE_H
+
+typedef uint16 StringID;
+static const StringID INVALID_STRING_ID = 0xFFFF;
+
+enum {
+	MAX_LANG = 64,
+};
+
+/** Information about a language */
+struct Language {
+	char *name; ///< The internal name of the language
+	char *file; ///< The name of the language as it appears on disk
+};
+
+/** Used for dynamic language support */
+struct DynamicLanguages {
+	int num;                         ///< Number of languages
+	int curr;                        ///< Currently selected language index
+	char curr_file[MAX_PATH];        ///< Currently selected language file name without path (needed for saving the filename of the loaded language).
+	StringID dropdown[MAX_LANG + 1]; ///< List of languages in the settings gui
+	Language ent[MAX_LANG];          ///< Information about the languages
+};
+
+// special string constants
+enum SpecialStrings {
+
+	// special strings for town names. the town name is generated dynamically on request.
+	SPECSTR_TOWNNAME_START     = 0x20C0,
+	SPECSTR_TOWNNAME_ENGLISH   = SPECSTR_TOWNNAME_START,
+	SPECSTR_TOWNNAME_FRENCH,
+	SPECSTR_TOWNNAME_GERMAN,
+	SPECSTR_TOWNNAME_AMERICAN,
+	SPECSTR_TOWNNAME_LATIN,
+	SPECSTR_TOWNNAME_SILLY,
+	SPECSTR_TOWNNAME_SWEDISH,
+	SPECSTR_TOWNNAME_DUTCH,
+	SPECSTR_TOWNNAME_FINNISH,
+	SPECSTR_TOWNNAME_POLISH,
+	SPECSTR_TOWNNAME_SLOVAKISH,
+	SPECSTR_TOWNNAME_NORWEGIAN,
+	SPECSTR_TOWNNAME_HUNGARIAN,
+	SPECSTR_TOWNNAME_AUSTRIAN,
+	SPECSTR_TOWNNAME_ROMANIAN,
+	SPECSTR_TOWNNAME_CZECH,
+	SPECSTR_TOWNNAME_SWISS,
+	SPECSTR_TOWNNAME_DANISH,
+	SPECSTR_TOWNNAME_TURKISH,
+	SPECSTR_TOWNNAME_ITALIAN,
+	SPECSTR_TOWNNAME_CATALAN,
+	SPECSTR_TOWNNAME_LAST      = SPECSTR_TOWNNAME_CATALAN,
+
+	// special strings for player names on the form "TownName transport".
+	SPECSTR_PLAYERNAME_START   = 0x70EA,
+	SPECSTR_PLAYERNAME_ENGLISH = SPECSTR_PLAYERNAME_START,
+	SPECSTR_PLAYERNAME_FRENCH,
+	SPECSTR_PLAYERNAME_GERMAN,
+	SPECSTR_PLAYERNAME_AMERICAN,
+	SPECSTR_PLAYERNAME_LATIN,
+	SPECSTR_PLAYERNAME_SILLY,
+	SPECSTR_PLAYERNAME_LAST    = SPECSTR_PLAYERNAME_SILLY,
+
+	SPECSTR_ANDCO_NAME         = 0x70E6,
+	SPECSTR_PRESIDENT_NAME     = 0x70E7,
+	SPECSTR_SONGNAME           = 0x70E8,
+
+	// reserve MAX_LANG strings for the *.lng files
+	SPECSTR_LANGUAGE_START     = 0x7100,
+	SPECSTR_LANGUAGE_END       = SPECSTR_LANGUAGE_START + MAX_LANG - 1,
+
+	// reserve 32 strings for various screen resolutions
+	SPECSTR_RESOLUTION_START   = SPECSTR_LANGUAGE_END + 1,
+	SPECSTR_RESOLUTION_END     = SPECSTR_RESOLUTION_START + 0x1F,
+
+	// reserve 32 strings for screenshot formats
+	SPECSTR_SCREENSHOT_START   = SPECSTR_RESOLUTION_END + 1,
+	SPECSTR_SCREENSHOT_END     = SPECSTR_SCREENSHOT_START + 0x1F,
+
+	// Used to implement SetDParamStr
+	STR_SPEC_DYNSTRING         = 0xF800,
+	STR_SPEC_USERSTRING        = 0xF808,
+};
+
+#endif /* STRINGS_TYPE_H */