Does not support multilingual sites

How have you made your site multilingual? Which plugin / theme are you using?
Currently Waiting doesn’t support Multilingual translations, but if you can edit PHP files, I can give you some code to make it work.

plugin.builders, we are using WPML currently. A patch from you would be great, but why don’t you apply it to the plugin so that everyone could benefit from it?

I assume you have some knowledge of PHP.
Edit the Waiting.php file of Waiting plugin, look for translateTermsfunction, then replace with the below function.

Write if/else statements for the lanaguages you need the terms for. See what the constant ICL_LANGUAGE_CODE holds ( uppercase / lowercase etc ), I don’t have WPML installed, I got this constant from some post in their site.

I have plans for this to include in the plugin, but some users have also asked for Translate forms for each plugin, I’ll have to think about the UI.

	function translateTerms(){
		self::$terms['fui'] = array();
		
		$unit_terms = array();
		
		if( ICL_LANGUAGE_CODE === 'es' ){
			// Replace Years, Months etc with their Spanish terms
			$unit_terms =  array(
				'years' => __('Years', 'waiting'),
				'months' => __('Months', 'waiting'),
				'weeks' => __('Weeks', 'waiting'),
				'days' => __('Days', 'waiting'),
				'hours' => __('Hours', 'waiting'),
				'minutes' => __('Minutes', 'waiting'),
				'seconds' => __('Seconds', 'waiting')
			);
		} else if (ICL_LANGUAGE_CODE === 'de'){
			// Replace Years, Months etc with their German terms
			$unit_terms =  array(
				'years' => __('Years', 'waiting'),
				'months' => __('Months', 'waiting'),
				'weeks' => __('Weeks', 'waiting'),
				'days' => __('Days', 'waiting'),
				'hours' => __('Hours', 'waiting'),
				'minutes' => __('Minutes', 'waiting'),
				'seconds' => __('Seconds', 'waiting')
			);
		} else {
			// Return English terms by default. You can make any other language the default one.
			$unit_terms =  array(
				'years' => __('Years', 'waiting'),
				'months' => __('Months', 'waiting'),
				'weeks' => __('Weeks', 'waiting'),
				'days' => __('Days', 'waiting'),
				'hours' => __('Hours', 'waiting'),
				'minutes' => __('Minutes', 'waiting'),
				'seconds' => __('Seconds', 'waiting')
			);
		} 
		
		self::$terms['units'] = $unit_terms;
	}

Yes, I’m familiar with PHP. Sadly the code didn’t work.

I find it most convenient for the strings not to be editable from the admin panel, but to be available for translation as any other normal string in a theme or plugin, as people wouldn’t want anything else in the Minute label than Minute in their language (I guess?). Anyone building a non-English site will know how to translate the original strings, once they use the gettext functions.

Did you echo ICL_LANGUAGE_CODE; ? I don;t know what’s in ICL_LANGUAGE_CODE. Find the value it contains and compare against it.