How to Say "untruths" in Spanish
The most common Spanish word for “untruths” is “mentiras” — use this word for direct statements that are known to be untrue, often with an intention to deceive..
mentiras
men-TEE-ras/menˈtiɾas/

Examples
No me gustan las mentiras. Siempre digo la verdad.
I don't like lies. I always tell the truth.
Su historia estaba llena de mentiras y contradicciones.
His story was full of lies and contradictions.
El niño juró que no había dicho mentiras sobre el jarrón roto.
The child swore he hadn't told lies about the broken vase.
Gender and Plural
This word is the plural of 'la mentira' (a feminine word), so it always uses feminine articles and adjectives, like 'las mentiras'.
Verbs of Communication
To express the act of speaking untruths, use verbs like 'decir' (to say) or 'contar' (to tell/narrate) before 'mentiras'.
Confusing Noun and Verb
Mistake: “Using 'mentiras' when you mean the verb 'to lie' (mentir).”
Correction: Remember 'mentiras' is the *things* that are not true (the noun). The verb form is usually 'mientes' (you lie).
falsas
FAHL-sahs/ˈfalsas/

Examples
Su testimonio estaba lleno de falsas.
His testimony was full of falsehoods.
No te fíes de esas falsas que circulan en internet.
Don't trust those untruths circulating online.
Acting as a Noun
When used as a noun, 'falsas' refers directly to the untrue things themselves, often substituting for the word 'mentiras' (lies).
Choosing Between 'mentiras' and 'falsas'
Related Translations
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