Sus Linguae, a Latin term which translates to "under the tongue," can be tricky to find synonyms for. However, there are several ways to express this same idea. One option is to use the phrase "sublingual," which describes anything beneath the tongue. Other possible synonyms include "oral-facial," "submucosal," or "buccal," which all refer to areas within the mouth. In the medical field, clinicians may also use the term "oral cavity" or "oral mucosa." Overall, while Sus Linguae may not have an exact synonym in the English language, there are plenty of alternative expressions available to convey the same meaning.