The reason you do not get Russian text from the sentence() method is because it does not use text from Text.php .
The sentence() method is defined in Lorem.php and uses the list of words in this file. You either need to use the realText() method, or implement the Russian version of the dictionary list (which the author of Faker has already said no )
In short, you need to use this line to get the Russian text:
$faker = Faker::create('ru_RU'); $randomSentence = $faker->realText();
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