Multilanguage data (PHP data in MySQL table)

[Thevenin]

Hi all, I'm here again to ask a little thing.

I'm writing a PHP form that store some data in a MySQL database.
Unfortunatelly today I thought that I'd like to have a multilanguage translation for the data stored in the database.

The usage of the PHP Form is:
from the dropdown list the user can choose from a setted (by me) data, but I'd like that this data could be translated for other people.

I thought something like this, here my PHP Form:

<form method="post" enctype="multipart/form-data" action="">
Kind of plants:<br /> 
                <select name="id_plants"> 
                    <option value=""></option> 
                    <option value="tree">Trees</option> 
                    <option value="shrub">Shrubs</option> 
                    <option value="bush">Bushes</option></select> 
                <br /> 
                <input type="submit" name="submit" id="submit" value="Submit">
</form> 

Instead of:

option value="tree"
option value="shrub"

put something like:

option value="1"
option value="2"

and create a function that knows:
1 is tree (and the translation in other languages);
2 is shrub (and the translation in other languages).

I'd like to know from you if there is a fast method to do it and if not a little help for my translation function, just some ideas.

Thank you in advance and sorry if I was not so clear but I'm a little tired.