Text: "no forum selected" which appears if I want to add a new topic can not be translate.
It is missing both in wpForo and LOCO translate phrases.
Thank you for letting us know. This will be fixed in next version release. If you need to resolve this asap please follow this steps:
1. In the wp-content/plugins/wpforo/wpf-includes/class-template.php file find the following line (line 157)
<option class="wpf-topic-form-no-selected-forum" value="0">-- <?php _e('No forum selected', 'wpforo'); ?> --</option>
2. Replace to this one:
<option class="wpf-topic-form-no-selected-forum" value="0">-- <?php wpforo_phrase('No forum selected'); ?> --</option>
3. Navigate to Dashboard > Forums > Dashboard admin page, click on [Rebuild Phrases] button
4. Navigate to Dashboard > Forums > Phrases admin page, find the "no forum selected" phrase and translate it.
Don't forget to delete all caches before checking.