How to Say "reich" in Spanish
The Spanish word for “reich” is “Reich” — B2 level.

Examples
El Tercer Reich es un periodo muy estudiado en las clases de historia.
The Third Reich is a period widely studied in history classes.
Muchos documentos del Reich fueron destruidos al final de la guerra.
Many documents of the Reich were destroyed at the end of the war.
La caída del Reich marcó el fin de una era en Europa.
The fall of the Reich marked the end of an era in Europe.
Gender of German Loanwords
In Spanish, the word 'Reich' is masculine ('el Reich'). Even though it's a foreign word, Spanish speakers treat it like most other words ending in a consonant.
Always Capitalized
Since it refers to a specific historical entity, you should always write it with a capital 'R' in Spanish, just like in German.
Gender confusion
Mistake: “La Reich”
Correction: El Reich (The word is masculine in Spanish).
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