Should I use Cyrillic keys in an array (PHP)?

Question

MySQL

Good afternoon.
The user creates an ad, the ad can have an arbitrary number of additional fields. I created a separate table for ads, separately for ad parameters. The ad parameters table has ad_id, param, value fields. The site is Russian, the parameters will be Cyrillic. Roughly speaking param = 'color', value = 'red'.
Question! Is it worth it to do so? I don't see any other solution. I refer to the parameter like this: $param['color']. In postgre, of course, you can store the parameter in an array, but the meaning of this will not change, the array keys will remain Cyrillic.
UPD: if ($param == 'color'){} seems to me an equivalent solution, if not worse, because it clutters up the code.

Answer 1

Create fields in the table:
ad_id, param_name, param_title, value
For example:
param_name = color
param_title = color
value = red
Although PHP supports Cyrillic keys, it's better to be safe.

Answer 2

class Property {
public $name;
public $value;
}

Answer 3

Yes, php, in general, don't care what language the array key is in