Foreign nouns and their plural forms?

You're asking for a lot! There are hundreds, if not thousands, of foreign nouns with irregular plural forms. It's impossible to list them all here, but I can give you some examples and pointers to help you navigate them.

Here are some examples of foreign nouns and their plural forms:

* Latin:

* alumnus (masculine) - alumni (plural)

* alumna (feminine) - alumnae (plural)

* curriculum - curricula

* datum - data

* erratum - errata

* medium - media (sometimes mediums for "mediums of communication")

* octopus - octopuses or octopodes

* phenomenon - phenomena

* radius - radii

* stimulus - stimuli

* Greek:

* analysis - analyses

* axis - axes

* basis - bases

* crisis - crises

* diagnosis - diagnoses

* hypothesis - hypotheses

* octopus - octopuses or octopodes

* phenomenon - phenomena

* thesis - theses

* French:

* beau - beaux

* bureau - bureaus

* tableau - tableaux

* Italian:

* bravo - bravi (masculine) or brave (feminine)

* concerto - concerti

* libretto - libretti

* soprano - soprani

* Spanish:

* el señor (masculine) - los señores (plural)

* la señora (feminine) - las señoras (plural)

Here are some tips for remembering plural forms:

* Look for patterns: Some languages have consistent patterns for forming plurals (e.g., adding "-i" to Italian nouns ending in "-o").

* Use a dictionary: Dictionaries usually list both the singular and plural forms of foreign nouns.

* Consult a grammar guide: Grammar books for specific languages can provide detailed information on pluralization rules.

* Remember that usage varies: Sometimes, there are multiple correct plural forms for a foreign noun.

Remember, practice makes perfect! The more you read and write in various languages, the more familiar you'll become with their different plural forms.