Power Query Formula Language can be stated as "M," which is the officially acknowledged term widely used across documentation, forums, and training materials. However, some specific contexts are also described using words other than formalized terms or not universally accepted ones:
"Power Query M"
This would specifically associate the language with Power Query since there might be confusion in discussions or documentation over simply "M."
"Data Mashup Language"
In earlier Microsoft documentation, "M" was sometimes referred to as "Data Mashup Language," stressing its role in transforming and amalgamating data, though this usage has waned lately.
"M Script"
In fact, some users and practitioners refer to it informally as the 'M script,' pointing out its scripting essence in education or tutorial writing.
Recommendations:
In terms of clarity and comprehensiveness, "M" am "Power Query M" stands tall as the most apt and most used term in both formal and professional contexts. If necessary, this may be followed by an explanatory narrative, e.g., "Power Query's formula language (M)."