Core PHP Site translate to other language

I have create array $_en to store English words/sentences and $_no array to store Norwegian text to use it as translation for my core PHP project.

<?php
$_en = array(
    'mail' => 'email',
    'msg1' => 'how are you?'
    
);
$_no = array(
    'mail' => 'epost',
    'msg1' => 'hvordan har du det ?'
);

echo "EMAIL IN ENGLISH:".$_en['mail']."\n"; //email in english
echo "EMAIL IN NORWEGIAN:".$_no['mail']; //email in NORWEGIAN
echo "Message IN NORWEGIAN:".$_no['msg1']; //Message in NORWEGIAN

Based on the array and the key value the text will be called based on the site translation function.

Any better solutions and enhancements are most welcome.

A better solution, as mentioned my Thamilan in the comments would be to use a class to handle conversions.

Think of it like this;

Your Template File

$trans = new Translate('en');
<h1><?php echo $trans->__('This is a title'); ?></h1>

Translate.php

class Translate {
    public function __construct($lang) {
        $this->lang = $lang;
    } 

    public function __($string) {
        // $translatedString = $this->getTranslatedString($string);
        return $translatedString;
    }
}

In this class, you'll need to fetch the translation from where it's stored. You could store in in this class in an array, or a better solution would be to load them from a CSV file.