To get merit not only improving English is enough to get a merit, your post must be informative, useful and helpful if you help and post a high quality and informative post you can receive a merit depends on if the sMerit source or high-rank members found that your post is useful.
You can follow the guide how to get merit here
https://bitcointalk.org/index.php?topic=3182178.0Hope next time that you use the magnifying glass left-side of the search box above of this page.