Introduce way to dynamically map the languages, helps reduce the typing and also should "just work" if there's any new languages added

eos/config.py

@@ -19,7 +19,12 @@ lang = ""
 # Maps supported langauges to their suffix in the database
 translation_mapping = {
     "en_US": "",
-    "zh_CN": "_zh"
+    "fr": "_fr",
+    "it": "_it",
+    "ja": "_ja",
+    "ko": "_ko",
+    "ru": "_ru",
+    "zh_CN": "_zh",
 }
 
 def set_lang(i18n_lang):

eos/db/gamedata/category.py

@@ -26,8 +26,7 @@ import eos.config
 
 categories_table = Table("invcategories", gamedata_meta,
                          Column("categoryID", Integer, primary_key=True),
-                         Column("name", String),
-                         Column("name_zh", String),
+                         *[Column("name{}".format(lang), String) for lang in eos.config.translation_mapping.values()],
                          Column("description", String), # deprecated
                          Column("published", Boolean),
                          Column("iconID", Integer))