How to change language in each page ?

There’s no way to redefine any PHP constant, so what you suggest will not work. Try setting the global $locale to equal the language value for the particular page in it’s head section. That just might do the trick.

Hi bcworks,

Thanks, I will give a try of your suggestions, I guess following article also suggest to use this.

setlocale(LC_ALL, “de_DE”); //at page’s start of header
setlocale(LC_NUMERIC, ‘C’); //to avoid and numeric mismatched as nicely explained in below artible.

https://www.code-styling.de/english/php-function-setlocale-and-numbers-can-be-damaged

Well, I tried but It seems not working this way.

I have created .mo files and placed into WP_LANG_DIR directory and use below two line, to set the language at the beginning of the page header file but it seems not taking any effect.

setlocale(LC_ALL, “de_DE”);
setlocale(LC_NUMERIC, ‘C’);

I’m not sure what setlocale actually does, couldn’t find it’s source. You might also check the global $l10n which should contain arrays of translations. If not, the language files are not getting loaded.

It looks like just setting locale is not enough, you need to explicitly load the related language files. Take a look at wp-includes/l10n.php. There is a load_textdomain() function, along with a bunch of variants for plugins and themes. They appear to be an important part of getting this to work, but I’m unclear how to actually make use of them.

Are there any plugins that change languages after loading WP? You may learn something from how they do things.

true, I have already started to dig into l10n.php file and all load_textdomain() and other textdomain related functions.

Initially I thought this could be a simple setup somewhere now it turn out to be some good stuff to explore and debug.

My default is English and I not loading any other non-english plugins so I guess that is not an issue.

Let me explore bit more with textdomain stuff and see.

I meant to say you should investigate any available plugins out there that change languages to see how they do things. Not that you have any on your installation. Could be another avenue for learning. I’m certainly not much help. Good luck!

After lots of hack and reading, I managed to solve this and getting it worked at https://www.oyetweet.com where it does translate to multiple languages in one post.

//tony: add all language related mo files to initiate the MO array.
global $jwp_lang;

$jwp_lang['textdomain'] = 'brazil_portuguese';
$domain = $jwp_lang['textdomain'];
$mofile = ABSPATH . 'wp-content/languages/' . $jwp_lang['textdomain'] . '.mo';
load_textdomain($domain, $mofile);

than I simply select the textdomain based on country title.

$title = get_the_title();
if (strtolower($title) == 'brazil') $jwp_lang['textdomain'] = 'brazil_portuguese';
if (strtolower($title) == 'germany') $jwp_lang['textdomain'] = 'german_germany';
if (strtolower($title) == 'philippines') $jwp_lang['textdomain'] = 'philippines_filipino';
if (strtolower($title) == 'malaysia') $jwp_lang['textdomain'] = 'malaysia_malay';

and to display content, I use this

global $jwp_lang;
__('Suggest Celebrity', $jwp_lang['textdomain'])

Good work Tony! I know several people will want to make use of this. Thank you for sharing.