Title: Error: Invalid MO format
Last modified: August 30, 2016

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# Error: Invalid MO format

 *  Resolved [giginono](https://wordpress.org/support/users/giginono/)
 * (@giginono)
 * [10 years, 10 months ago](https://wordpress.org/support/topic/error-invalid-mo-format-3/)
 * Hi,
 * I would like to translate my theme (Mission WP) with Loco Translate.
    I installed
   the French language but it doesn’t work. When I click on “Sync”, I see this error
   message : Error : Invalid MO format. I tried to install another French version
   like French (Belgium), and it appears the same message …
 * Could you help me?
 * Thanks
 * [https://wordpress.org/plugins/loco-translate/](https://wordpress.org/plugins/loco-translate/)

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [Tim W](https://wordpress.org/support/users/timwhitlock/)
 * (@timwhitlock)
 * [10 years, 10 months ago](https://wordpress.org/support/topic/error-invalid-mo-format-3/#post-6420534)
 * I suspect the current version of Loco Translate is not compatible with your theme.
 * The error message is misleading, but the most common root cause is that Loco 
   Translate doesn’t understand how your theme is set up and has ended up looking
   at the wrong files.
 * There is no fix for this issue in the current 1.5.x branch of the plugin. You
   will have to translate your theme manually, or with some other software.
 * The next major release of the plugin (2.0) will hopefully address this, but as
   it’s a pay-for theme it won’t be added to list of themes to test against.
 *  Thread Starter [giginono](https://wordpress.org/support/users/giginono/)
 * (@giginono)
 * [10 years, 10 months ago](https://wordpress.org/support/topic/error-invalid-mo-format-3/#post-6420542)
 * Thank you for your answer.
    Fingers crossed Do you know a easy and good way to
   translate manually this theme?
 *  Plugin Author [Tim W](https://wordpress.org/support/users/timwhitlock/)
 * (@timwhitlock)
 * [10 years, 10 months ago](https://wordpress.org/support/topic/error-invalid-mo-format-3/#post-6420549)
 * Not knowing this theme, I can’t tell you how easy or difficult it will be. Manual
   translation can get technical. There is lots to read about it. Perhaps [start here](https://developer.wordpress.org/themes/functionality/localization/).
 * I suggest you contact the theme author for help translating it. Especially, as
   you paid money for it.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Error: Invalid MO format’ is closed to new replies.

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## Tags

 * [format](https://wordpress.org/support/topic-tag/format/)
 * [invalid](https://wordpress.org/support/topic-tag/invalid/)

 * 3 replies
 * 2 participants
 * Last reply from: [Tim W](https://wordpress.org/support/users/timwhitlock/)
 * Last activity: [10 years, 10 months ago](https://wordpress.org/support/topic/error-invalid-mo-format-3/#post-6420549)
 * Status: resolved