From the [/posts documentation](https://api.stackexchange.com/docs/posts):

> Most applications should use the question or answer specific methods, but /posts is available for those rare cases where any activity is of **intereset**.

interes**e**t => interest

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From [/posts/{ids}/suggested-edits ](https://api.stackexchange.com/docs/posts-on-suggested-edits):

> Returns **suggsted** edits on the posts identified in ids.

suggsted => sugg**e**sted

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From [/questions/{id}/flags/add](https://api.stackexchange.com/docs/create-question-flag):

> Casts a flag (including <b>"</b>close votes) against the question identified by id.

The double quote isn't terminated, I assume "close votes" was meant.

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From [/questions](https://api.stackexchange.com/docs/questions):

> This is an **and** contraint,

(emphasis not mine; the typo is in the word con**s**traint)