Why my pages come in English even the current language is another?

Question

Until wednesday, everything was fine but for two days it is so strange. I am using DirectPHP plug-in to create my own pages. And use template's language files for the constant expressions and labels in the page.

I use the language file in this way:

$titles = array('', 'TPL_MY_TEMPLATE_TITLE_1', 'TPL_MY_TEMPLATE_TITLE_2', 'TPL_MY_TEMPLATE_TITLE_3', 'TPL_MY_TEMPLATE_TITLE_4');
$expressions = array('', 'TPL_MY_TEMPLATE_EXPRESS_1', 'TPL_MY_TEMPLATE_EXPRESS_2', 'TPL_MY_TEMPLATE_EXPRESS_3', 'TPL_MY_TEMPLATE_EXPRESS_4');

I double checked that

1. if corresponding label exists in both language files
2. if there is any typographic error (even if so, I could see key's itself instead of corresponding value)

I also have copied my template for each language. Nothing changed.

I see labels and comments in English in both Turkish and English pages. What could be the problem? I have not made any update, any change.

Answer 1

Finally I found athe error!

I discovered that two lines were side by side accidentally.

...
TPL_MY_TEMPLATE_TITLE_1 = "Title 1"TPL_MY_TEMPLATE_TITLE_2 = "Title 2"
...

After hitting enter key the problem has gone. I must confess that I have seen the problem using language debugging. I did not know language debugging until Lodder suggested. Thanks.