Although my response is belated, I encountered the same issue and found a solution. It may benefit others in the future.
To address this problem, navigate to the source files of the plugin and modify the following file:
wp-content/plugins/transposh-translation-filter-for-wordpress/wp/transposh_widget.php
In lines 301-306, make adjustments to the code snippet below:
if ($this->transposh->is_editing_permitted()) {
$ref = transposh_utils::rewrite_url_lang_param($_SERVER["REQUEST_URI"], $this->transposh->home_url, $this->transposh->enable_permalinks_rewrite, ($this->transposh->options->is_default_language($this->transposh->target_language) ? "" : $this->transposh->target_language), !$this->transposh->edit_mode);
echo '<input type="checkbox" name="' . EDIT_PARAM . '" value="1" ' .
($this->transposh->edit_mode ? 'checked="checked" ' : '') .
' onclick="document.location.href=\'' . $ref . '\';"/> Edit Translation';
}
Update the code to include the following:
if ($this->transposh->is_editing_permitted()) {
$ref = transposh_utils::rewrite_url_lang_param($_SERVER["REQUEST_URI"], $this->transposh->home_url, $this->transposh->enable_permalinks_rewrite, ($this->transposh->options->is_default_language($this->transposh->target_language) ? "" : $this->transposh->target_language), !$this->transposh->edit_mode);
echo '<input type="checkbox" name="' . EDIT_PARAM . '" value="1" ' .
($this->transposh->edit_mode ? 'checked="checked" ' : '') .
' onclick="document.location.href=\'' . $ref . '\';"/><p class="edittranslationtext"> Edit Translation</p>';
}
I have simply introduced a paragraph element with the class edittranslationtext. You can now include the following in your Custom CSS:
.edittranslationtext {
display: none;
}