No it doesn't require to be capitalized.
There is no grammatical reason to capitalize every word in a sentence. It may sometimes be done as someone's attempt at emphasis, but it is never grammatically correct.
yes it is a real word. It is also correct grammatically and more stupid is not correct.
Yes, it is.
No, selled is not grammatically correct in English.The correct past tense of 'sell' is sold.
yes it is, if you type this way, "in-chargeship"
There is no grammatical reason to capitalize every word in a sentence. It may sometimes be done as someone's attempt at emphasis, but it is never grammatically correct.
No, there is no need to capitalize "linguists" as it is not a proper noun. You would only capitalize it if it was forming part of a title.
Both are grammatically correct, but the normal word-order is "you are correct." The inverted word-order of "correct you are" is used for an emphatic, ironic or humorous effect.
The word "they're is pronounced grammatically correct. It is the shortened version of the words "they are".
No it isn't a grammatically correct word.
no
No it's not correct. The word "am" only sounds grammatically correct with the pronoun of I
The correct spelling of the word "grammatically" is G-R-A-M-M-A-T-I-C-A-L-L-Y.
yes it is a real word. It is also correct grammatically and more stupid is not correct.
Yes, it is.
The word "they're is pronounced grammatically correct. It is the shortened version of the words "they are".
No, trueful is not a grammatically correct word in English. The word you could be looking for is truthful.