What's the plural form of colloquialization? Here's the word you're looking for.
Answer
The noun colloquialization can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be colloquialization.
However, in more specific contexts, the plural form can also be colloquializations e.g. in reference to various types of colloquializations
or a collection of colloquializations.