* Scottish Gaelic: The most common word is broth (pronounced broakh). While it implies a thinner soup, it's often used as a general term. You might also use a more descriptive phrase depending on the type of soup.
* Irish Gaelic: The word is broth (pronounced braw). Similar to Scottish Gaelic, this is a general term and more descriptive phrases might be used for specific soups.
There isn't a single word equivalent to "soup" that covers all types in either language like there is in English.