The Welsh word for thank you is diolch, pronounced DEE-olch. To sound more polite or enthusiastic, you can say diolch yn fawr (thanks a lot) or diolch yn fawr iawn (thank you very much).
Saying thank you in Welsh is simple, meaningful, and a lovely way to connect with Welsh language and culture. Whether you’re learning Welsh, visiting Wales, or just curious about the language, these phrases are a great place to start.

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Diolch is the most common and widely used way to say thank you in Welsh.
It’s suitable for everyday conversation and works just like “thanks” in English.
This phrase adds extra warmth and appreciation.
It’s often used in polite situations or when someone has gone out of their way to help.
Literally meaning “a very big thank you”, this phrase is perfect when you want to express heartfelt or enthusiastic thanks.
Welsh spelling is very consistent, which makes pronunciation easier once you learn a few basic sounds.
Pronunciation: DEE-olch
The ch sound is a soft sound made at the back of the throat, similar to the “ch” in the Scottish word loch.
Pronunciation: DEE-olch un VAOOR
In Welsh, the letter f is pronounced like a v in English.
Pronunciation: DEE-olch un VAOOR YAOWN
This simply adds extra emphasis to your thanks.
Here are some common everyday phrases using diolch:
Use this phrase when politely declining an offer, invitation, or suggestion.
Using simple Welsh words like diolch shows respect for Welsh language and culture. Welsh speakers always appreciate the effort — even learning just one word can make a positive impression.
If you’re exploring Welsh phrases, this is a perfect first step.
Diolch means thank you in Welsh.
Welsh looks unfamiliar at first, but pronunciation is very consistent and becomes easy with practice.
Yes, even a small effort is warmly received.
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