How do you say can I go to the bathroom in Irish?

There are a few ways to say "Can I go to the bathroom?" in Irish, depending on the context and formality:

Formal:

* An féidir liom dul go dtí an leithreas? (This is the most formal way to say it.)

Informal:

* An féidir liom dul go dtí an seomra folctha? (This is a more casual way to say it.)

* An féidir liom dul go dtí an t-seomra beag? (This is a very casual way to say it, almost like saying "Can I use the restroom?")

Even more informal (and possibly considered rude):

* Ba mhaith liom dul go dtí an leithreas. (This literally translates to "I would like to go to the bathroom" and is not considered polite.)

Tips:

* If you are unsure, it is always best to use the most formal phrase: An féidir liom dul go dtí an leithreas?

* You can also use the phrase "An bhfuil seomra folctha agat?" (Do you have a bathroom?) if you are asking for directions to the bathroom.

Remember that Irish is a spoken language, so the pronunciation of these phrases is very important. If you are unsure about pronunciation, you can use online dictionaries or resources.