Well, not to be rude but there is a mistake in your question, instead of just mistake, it would be mistakes because it is plural. The most common mistake I think in the English language is sheeps and fishes. The plural is sheep and fish. But when you are referring to multiple kinds of fish the word fishes can be used. Another one is octopuses and cactuses. This would be cacti and octapi. Although, octapouses is getting more and more comon and now is somewhat grammatically correct.
Vernacular is the common, spoken English as opposed to more formal, written English.
English is a language for tourism to communicate to other people because English is the most common language in the world,.
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so you didn't make mistake while talking with other people in English or while you're write something. ooh, by the way, it's not "inreach" it's "enrich."
The most common word in the English language is the word the.
E is the most common letter in the English language.
English language is international language. Nepali language common medium language.
the most common language in the US is English
English.
Irish Sign Language is the second most common non-English language in Ireland.
the most common figurative language (s) are English and Chinese.
Please the official language is the Czech language, but in shops, hotels etc. English language is common.
America does not have a primary language, English is just the common language spoken in America.
English
english
ENGLISH!
English