I am trying the new theme "monochrome" and although my language is set to Catalan, some strings of text ie. "write comment", "category", "home", etc. appera in English

Same thing with the date format which is american (month/day)

I know the language is well set because some words do appear in Catalan ie. the search box says "Search" in my language

My question:
is there a way to edit this within the settings?

otherwise, can I edit this by editing the Theme? (paying to do so first)

is this because the theme is new and not properly translated yet? if so, what can I do to help?

Thanks in advance