# 16 LEXICON (Text in UI)
//missing lexicon entries global lexicon lemma, language, appearance, date, part of speech verbs and nouns switch determiner switch preposition//
The AX Semantics NLG Cloud is able to apply correct grammar for numerous languages. This grammar is based on the global and user-specific lexicon, which most grammatical decisions are derived from.
The most common way to spot that grammatical information is missing from their content, is the occurrence of such mistakes as missing determiners or a wrong declination for a noun. If such things occur in your test content, chances are high that a missing lexicon entry might be the cause of that irregularity. Thus, an adequate solution for grammar errors oftentimes contains adding new words to the lexicon.