International signs
The multilingual lessons are based on the use of international signs. They are explained here:http://www.web07.yogote.net/pxs_informativas/3infoI.htm
You can use a dictionary to look for the sign for a certain idea:
In English: http://www.web07.yogote.net/Diccionarios/Selectores/SelectIng.htm
In Spanish: http://www.web07.yogote.net/Diccionarios/Selectores/SelectSpa.htm
In French: http://www.web07.yogote.net/Diccionarios/Selectores/SelectFra.htm
In Portuguese: http://www.web07.yogote.net/Diccionarios/Selectores/SelectPor.htm
In German:http://www.web07.yogote.net/Diccionarios/Selectores/SelectDeu.htm