* fix: imgur to s3 for englsh guide without conflict
(cherry picked from commit 9c9f15abf4e755feab79ef7090dacdcf497ea7b6)
* fix: revert unrelated changes
* Translate challenge subtitles and example challenge text to Spanish
* Corrected errors in syntax and punctuation
* Multiple corrections of it/s to its plus other grammar corrections
* Correction and added paragraph to CSS Flex article
* Corrected my own typo
* Corrected capitalization, American spellings and typos