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

---

# Error: Invalid MO format

 *  Resolved [heike-carle](https://wordpress.org/support/users/heike-carle/)
 * (@heike-carle)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/error-invalid-mo-format-2/)
 * First of all: Thanks for sharing “Loco Translate” here in wordpress repository.
   I’ve been looking for an alternative to the good old WP-plugin “Codestyling Localization”,
   which I used before, and your plugin seems to be a real good choice. Very cool
   plugin!
 * Second: Sorry for [previously posting this in the wrong place](https://wordpress.org/support/topic/error-invalid-mo-format-1?replies=7#post-7053955).
 * Playing around with Loco Translate in a local install of WP, a strange error 
   happened with the plugin Ultimate Member:
    We are using the plugin [Ultimate Member](https://ultimatemember.com/)(
   [the free version here in the repository](https://wordpress.org/plugins/ultimate-member/))
   and getting an Error: Invalide MO format.
 The language settings of Ultimate 
   Member (via Dashbord in the Plugins Menu) can be “forced” to update the language
   file acc. to the settings of WP (in our case German), and this seems to work 
   as there are files named ultimatemember-de_DE.po and ultimatemember-de_DE.mo 
   in wp-content -> languages -> plugins. Looking for the translations of Ultimate
   Member via Loco Translate, I cannot find that German .mo or .po file, but a Template-
   file redux-framework.pot and redux-framework.mo, which seems to be invalid: Trying
   to add a “New language” turns the message “Error: Invalid MO format”.
 * Does Loco Translate ignore files in the languages-folder of wp-content or are
   the settings of Ultimate Member preventing Loco Translate?
 * Cheers, Heike
 * [https://wordpress.org/plugins/loco-translate/](https://wordpress.org/plugins/loco-translate/)

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Tim W](https://wordpress.org/support/users/timwhitlock/)
 * (@timwhitlock)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/error-invalid-mo-format-2/#post-6218591)
 * There’s a lot to address here:
 * First of all your plugin uses at least two text domains. Loco Translate 1.5.*
   doesn’t support multiple text domains within a single plugin. Version 2.0 will
   be a major rewrite and fix this issue.
 * Files in the global languages folder are not ignored (as such) but in your case
   the issue above is why they don’t show up. Loco has already established the redux-
   framework text domain for your plugin, so these ultimatemember files are not 
   being matched to anything.
 * As for the cause of your Invalid MO warning. I think this is because Loco is 
   trying to use redux-framework.mo as a template (because it has no locale). Removing
   this file should stop this specific error message, but I don’t think your problems
   will end there.
 * For the record: redux-framework.mo isn’t invalid, so much as empty because it
   was compiled from English, meaning no strings will be in it. I should change 
   the error message here.
 * Short version: You won’t be able to translate ultimate member using Loco Translate
   until version 2.
 *  Thread Starter [heike-carle](https://wordpress.org/support/users/heike-carle/)
 * (@heike-carle)
 * [10 years, 11 months ago](https://wordpress.org/support/topic/error-invalid-mo-format-2/#post-6218595)
 * Many thanks for your detailed explanation. So we will be gratefully waiting for
   upcoming versions of Loco Translate.

Viewing 2 replies - 1 through 2 (of 2 total)

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

 * ![](https://ps.w.org/loco-translate/assets/icon-256x256.png?rev=1000676)
 * [Loco Translate](https://wordpress.org/plugins/loco-translate/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/loco-translate/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/loco-translate/)
 * [Active Topics](https://wordpress.org/support/plugin/loco-translate/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/loco-translate/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/loco-translate/reviews/)

## Tags

 * [translate-plugin](https://wordpress.org/support/topic-tag/translate-plugin/)

 * 2 replies
 * 2 participants
 * Last reply from: [heike-carle](https://wordpress.org/support/users/heike-carle/)
 * Last activity: [10 years, 11 months ago](https://wordpress.org/support/topic/error-invalid-mo-format-2/#post-6218595)
 * Status: resolved