How to Say "is lying" in Spanish
The Spanish word for “is lying” is “miente” — A2 level. This is a very common word in everyday Spanish.

Examples
Mi hermano siempre miente cuando le pregunto dónde estuvo.
My brother always lies when I ask him where he was.
Usted miente, señor, los documentos dicen lo contrario.
You are lying, sir; the documents say the opposite.
¡Miente! No puedes decir la verdad si te metes en problemas.
Lie! You can't tell the truth if you're going to get in trouble. (Affirmative command to a friend)
Stem Change (E to IE)
The verb 'mentir' changes the 'e' in its root to 'ie' (e.g., mE-ntir becomes mIEnte) in most present tenses, except for 'nosotros' and 'vosotros'.
Dual Use
'Miente' can mean 'he/she/it lies' or 'you (formal) lie' (indicative present), OR it can be the command form for 'you' (tú command).
Forgetting the Stem Change
Mistake: “Él menta (Incorrect, using the regular verb pattern).”
Correction: Él miente (Correct, remember the 'e' changes to 'ie').
Related Translations
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