ISO certification itself doesn’t guarantee anything about the language (like English, Spanish, etc.) being used.
Instead, ISO standards focus on processes, quality, consistency, and compliance, regardless of the language.

For example:

• ISO 9001 (Quality Management) ensures an organization follows consistent quality processes.

• ISO 27001 (Information Security) ensures data is protected based on defined standards.

These standards can be documented and implemented in any language as long as:

• The processes are clearly understood.

• The implementation matches the intent of the ISO standard.

• The audit documentation is available in a language the auditor understand