guelben

This plugin allow you to translate your monolingual website in a super easy manner. You do not have to bother about .pot .po or .mo files. It safes you a lot of time cause you can effectively transalte thouse texts in a foreign language with just a few clicks gaining productivity. Bravo translate keeps your translations in your database. You dont have to worry about themes or plugins updates because your translations will not vannish.
<h3>Some texts are not translated how can I fix it?</h3>
If some of your texts are not translated, inspect your source code and check how they are written in your html. Sometimes the text is altered by css uppercasing. Other times some html tags may be inside your texts. Do not hesitate to copy thouse html tags.
For instance lets suppose you have this in your source code :
This is my super title
The translation of the text “This is my super title” will not work. Instead, copy “This is my super title” and insert it at the Text to Translate field.
<h3>Does this plugin slows my site?</h3>
This plugin has a very low impact in your page loading time. However try to limit very shorts texts to translate ( text with only 2 or 3 characters long). The plugin will find a lot of ocurrences of thouse short texts and it will have a lot of job to do deciding if it is text to translate or not. 
If you put a lot of texts with just 2 characters, you may increase the loading time by a some millisecs (of course that will also depend on your server performance).

Bravo Translate

The simplest solution for translate foreign texts or replace phrases you don't like. Works with texts coming form your plugins, themes, database  …

Planet Studio

WPC Simple Translate allows you to translate multilingual WordPress site.
It’s allows you to translate texts in places where other popular plugins usually have difficulty translating and you have to duplicate and keep the same slider, form, gallery, page builders widgets… in different languages.
Easy translate helps you to translate everything despite of themes or plugins specifications.
Currently it is working with Polylang and WPML plugins using plugins just for detecting frontend language.
Features 
Easy to use 
Fully compatible with all themes and plugins 
Ability to translate dynamic strings added by WordPress, plugins and themes. 
You can use as many languages as you want. 
It is easy to use, just put your texts in bellow format

WPC Simple Translate

Displays "Please install WPML or Polylang plugin to start using WPC Simple Translate plugin." and not working without them. Another one dummy plugin decoy for paid and expensive plugins! But idea to separate the same text to different translations is very good.

Not working without other commercial plugins

Translate texts in content, slider, form, gallery, page builders widgets... in different languages.  [:en]Hello[:fr]Bonjour[:]

Bravo Translate vs WPC Simple Translate