Many have been found to be inaccurate translations with grammatical and linguistic errors. Some languages have distinct irrealis grammatical verb forms. Klingon nouns take suffixes to indicate grammatical number. The distinctions made as part of lexical aspect are different from those of grammatical aspect. This difference is grammatical, but not lexical. Only languages with allophonic differences associated with grammatical boundaries have juncture as a phonological element. They also emphasize learning of a wide vocabulary base over learning new grammatical structures. Declension is the process or result of altering nouns to the correct grammatical cases. Pluralisation is effected by means of various grammatical and lexical tools. Black ASL differs from standard ASL in vocabulary, phonology, and some grammatical structure. This is often considered a grammatical or stylistic error. This article lists languages depending on their approach to grammatical gender. The paradigms of grammatical conjugation are numerous. The table below compares grammatical and phonological innovations. Not all languages have number as a grammatical category.