flarum-tags.admin.tags.about_tags_text

Does anyone know why i am getting these texts in frontend?

AshimAdhikari flarum-tags.admin.tags.about_tags_text
flarum-tags.admin.tags.primary_heading

You need to enable English language extenion.

And/or clear the Flarum cache. This is an effect from having a separate extension for English language and a beta 13 change to translations.