An approach is provided for validating translated files for inclusion in an application being developed. Content in a natural language is translated into another language and received as a first translation in a first translated file. Based on an error condition indicated by simulations of loading and presenting the first translation in a user interface of the application, a syntax error that causes the error condition is determined. The syntax error can include a lack of a match between a key and exactly one value, a missing key, or a mismatch of placeholders in the first translated file. Responsive to a receipt of a second translation of the content that includes the correction of the syntax error, and based on simulations of loading and presenting the second translation in the interface not indicating the error condition, the second translation is presented at runtime without causing the application to stop running.