Where does “メタ言語” come from?

メタ言語 (Japanese) comes from Japanese メタ, from English metal, from French métal, from German metall, from Italian metallo, from Spanish metal, from Old Spanish metal, from Old French métal — to mine, quarry.

メタ言語 (Japanese): metalanguage

Definitions

metalanguage

Ancestry of “メタ言語”, step by step

メタ言語 traces back through two separate lines of ancestry.

via Japanese メタ

Step	Language	Word	Meaning
1	Japanese	メタ	meta-, meta; German silver
2	English	metal	"Chemical elements or alloys, and the mines where...
3	French	métal	metal
4	German	metall	metal
5	Italian	metallo	metal
6	Spanish	metal	metal
7	Old Spanish	metal	metal
8	Old French	métal	metal material
9	Latin	metallum	metal; precious metals, especially gold or...
10	Ancient Greek	μέταλλον	A mine, quarry, or salt pit; metal
11	Ancient Greek	μέταλλευειν	to mine, quarry

via Japanese 言語

Step	Language	Word	Meaning
1	Japanese	言語	language, speech

Every word from Ancient Greek μέταλλευειν →Every word from Ancient Greek μέταλλον →Every word from Latin metallum →