Many grammar fixes

[ewg6679]

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:white_check_mark: ewg6679
:x: Emanuelle Griffin

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[joaquinelio]

Hundreds of changes to review, not easy. Please keep pr short and one issue only, dont mix grammar issues with style ones.

Besides, this pr shows conflicts with the current version. Maybe some issues are already fixed.

[shallow-beach]

vote to close if separate PRs were made