Usage Note
Legalmente modifies verbs and adjectives to indicate conformity with the law: legalmente vinculante (legally binding), actuar legalmente (to act legally). It often pairs with terms like obligado, responsable, and reconocido. In official documents it sometimes stacks with formalmente or oficialmente for emphasis, though in plain prose one adverb is usually enough.
Examples
"El contrato es legalmente vinculante para ambas partes."
Natural Translation
The contract is legally binding for both parties.

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