"You must think in Welsh."

Translation: Mae rhaid i chi feddwl yn Gymraeg.

[Wayniboy]

I ran out of hearts because it would not allow "Mae rhaid i ti feddwl yn Gymraeg", the familiar equivalent. O diar. I'm going to have a coffee now in my Welsh mug.

[Sulo0]

why is chdi correct?

[balbhan]

chdi is used in North Wales as an alternative to ti.

[WelshGirl90]

I have never heard of chdi being used in North Wales, which is where I have lived all my life. It's either chi - for formal or group use, or ti - for informal. At least that's what I know of. Is chdi used in the more traditional parts of North Wales?

[balbhan]

I've often heard North Walians use it. Mind you, rmcode calls it "North-West", and I have met more Welsh speakers from Gwynedd than anywhere else.
https://www.duolingo.com/comment/15146563

[shwmae]

Some north Walians use it, others don't. It's often an alternative to ti but some maintain a three-way distinction, with chdi, ti and chi all having slightly different meanings. Pretty cool!

[nebynAmlwch]

Mae'n rhaid is as acceptable as mae rhaid.

[Wayniboy]

I would have thought so. But apparently only 'chi' and not 'ti' is allowed!

[occitalan]

Don't we say "yng Nghymraeg" instead?

[y_ddraig_las]

I think that's the nasal mutation which doesn't apply here

[BruceF.]

Does not the preposition "yn" cause a nasal mutation? I'm confused...

[shwmae]

It's because yn Gymraeg is an abbreviation of yn y Gymraeg "in the Welsh language". The y "the" is usually dropped, leaving yn Gymraeg.

[deactivated user]

All this time I have believed that Gymraeg pertained to things Welsh and Cymraeg pertained to the Welsh language. Have I had it wrong all this time? It's worked for me so far.

[balbhan]

Gymraeg is just the soft mutation of Cymraeg. You're probably thinking of Cymraeg/Cymreig:

Cymraeg = "Welsh language", "Welsh-speaking",

Cymreig = "Welsh things"