In welsh i am going to sleep is rydw i'n mynd i gysgu.
cysga'n dda (cuss-gan tha) is the strict translation, but in welsh you would say NOS DA
sleep = cysgu
Both
"y diwedd" is how you say it in Welsh language.
'already' in welsh is 'eisoes'
Dw i'n mynd. This can mean I am going, I go, or I do go. All three are equivalent in Welsh.
cysga'n dda (cuss-gan tha) is the strict translation, but in welsh you would say NOS DA
You can say "ഞാൻ ഉറക്കുന്നു" (njan urakkunnu) in Malayalam to express "I'm going to sleep."
You can say "Beth wyt ti'n sôn amdano?" in Welsh, which translates to "What are you going on about?" in English.
sleep = cysgu
You can say "நான் தூங்குவேன்" (Nāṉ tuṅkuvēṉ) to mean "I am going to sleep" in Tamil.
Both
You can say "I am Welsh" by simply stating "I am Welsh" in English. In Welsh, you would say "Cymraeg ydw i" (I am Welsh).
Are you going to sleep is est-ce que tu vas dormir ? in French.
You can say "من دارم میخوابم" (man daram mikhabam) in Farsi or Persian, which translates to "I am going to sleep."
To say "I'm going to sleep" in Pig Latin, you would say "Imay oinggay otay eepslay."
'Our Friends' in Welsh is 'Ffrindiau Ni' :)