One of my favourite things about Welsh is that even those of us not first lanagauge, or living in predominately English areas, use a lot of Welsh in our every day vocab (&even in English areas everyone will understand)
However, it does mean I make a fool of myself and use these Welsh words as soon as I leave Wales, where suddenly no one understands them
So, here's a short list of words that you can either easily slot in to your every day if you're learning, or help you understand Welsh people you may meet (who may be twp, like me!)
(also, this is just MY small area, so I'm sure others can include loads of others phases and words!)
Names for Nana, granpa, and Dad! I don't think many use 'tad', however, you can get weird looks and questions for using nain a taid
Literally means 'sin', however it is used like 'shame!' or 'oh no!', or it can also be used in for 'cute' or 'heart-touching'. I did have a nursery teacher in nursery who used it as a pet name. So you might use this if a kid had just fallen over, or if you've been watching Undercover Boss and it's the reveal and it's getting you in the feels
A drink! Think 'a brew' or a 'cuppa'. (Most Welsh people i know, even non-welsh-speaking will over a panad in Welsh, 'ti'n isho panad?' so watch out for that)
Mostly South Walian, however it is becoming more popular up here in the north! Originally a 'cwtch' was the space under the stairs where people in Cardiff hid during the bombings in WW2, however it has since come to mean, most commonly, a big hug or squeeze (and this is important! At least to me, sometimes I've seen cwtch used just for a hug, but to me it means more than that. It's the hug you give to someone that is what is keeping them together as they fall apart, you know? The hug you give to a friend you'd fallen out with for ages but are now back together, or to someone whose just lost a close family member/friend, that kind of thing).
However, my family in Cardiff are divided because some of them say Cwtch can also be used as a pet name (I've personally never heard it used as a pet name, but it's not as popular a word in the north anyway, like I said, so that might be why, if anyone knows more about this let me know!)
Also a weird word because although it is said to be Welsh, the spelling 'cwtch' uses English pronunciation. The Welsh spelling 'cwtsh' does seem to be gaining momentum now though.
So this is used predominately in Coffi welsh that I've heard, however again, it's becoming more widely used! Literally translated it means 'white red sauce', but if you hear this what they're after is Mayo. A lot of my first lanagauge friends will, even in English, ask for 'white red sauce', so if you hear that, it means mayo (or salad cream, they don't seem that bothered)
Means hello! Again, more south I believe, a lot of South Walian Welsh speakers seem to use exclusively 'shwmae' as a greeting.
If someone use this after your name feel special! Bach literally translates to small, and is kind of added to your name (ie Kate bach, Beth bach, Dafydd bach) to show special affection.
Blods is short for 'blodyn tatws', literally, 'potato flower'! It's a term of endearment, which by most friends my age is shortened to blods, however some friends shorten it to 'tatws' (potato) which feels less endearing lol
In my experience mostly older people will use this, but it literally means 'love', and holds the connotations of 'beloved', 'sweetheart', 'darling'
Literally 'shut your mouth', a bit rude, only use with people you're good mates with who wouldn't take it personally, or can't understand Welsh!
'I don't know'! I use this all the time, I can't remember the last time I actually told someone I didn't know in English, it's one of those words/phrases which to me is just natural in Welsh (if that makes sense!)
Mae e'n cadw draenog yn ei boced
Literally 'he keeps a hedgehog in his pocket', meaning they'ry stingy!
Mae hi'n bwrw hen wragedd a ffyn!
Literally 'it's raining old women and sticks!', Welsh version of its raining cats and dogs (although I believe there is another Welsh version 'mae hi'n bwrw cyfyll a ffyrc', literally translates to 'its raining knives and forks', but I've never heard the expression in natural conversation')
Means 'might as well!' I'm not entirely sure what the direct translation is, however I've kind of understood it as 'a space and a place and a monkey', or 'a spot and a monkey'. (If anyone knows let me know plis!)
Diolch/ Diolch o galon/diolch yn fawr
Can't believe I almost for got this! I use diolch, meaning 'thanks', a lot, but if I'm so overwhelmingly grateful that I don't know how to express is, I turn to 'diolch o galon', literally 'thank you from my heart'. Again its on of those things that saying thank you in English just doesn't sound like I'm thankful, or feel like I've actually expressed it
Literally stupid or thickheaded. I call myself this a lot, but I also think it's such a light hearted way to make fun of someone, it's like bubbles, no one can be angry saying 'twp!' (or even better it's mutation 'dwp')
Literally 'lovely', think the application is obvious lol
(ended the post with this and then realised I hadn't included it lol) means 'good night', again obvious application, but I do have a funny story
A neighbour of mine is from Yorkshire, and she said when she was growing up there was a v popular Welsh comedian who ended all of his shows with 'nos da' and she understood it as 'no star', and until she was 16 just seriously believed there was some random natural anomaly that meant there were no stars visible in Wales
Might add more if I think of any, but otherwise, add any if anyone thinks of others!