Welsh proof-reading help

Hi all! Any Welsh speakers around that wouldn't mind me running a few (probably 10-20) Welsh sentences past them to check if they make sense? I'm currently writing an AU piece about Hermione & Remus significantly after the war where he starts hiding Welsh phrases in his letters to her while she's on an overseas secondment, using the first letter in each paragraph to form an acrostic. Fundamentally it's his way of saying what he wishes he could say out loud.

But my Welsh is very limited, so could really do with an expert eye!

Thanks :)