My dear and respected teachers,
1: "Why can I help you in English?" Does it make sense?
2: "Shoib Akhter has come back to the team OR in the team." Which one is correct?
3: "Which language is this word?" OR "Of which language is this word?"
4: "He backbites me OR he backbites against me OR he backbites on me."
Hi twilit1988
Try,
1: How can I help you in/with English?
2: Shoib Akhter is back on the team.
3: What language is this word?
4: He talks (about me) behind my back.