Using the minus (-) key to buy an item in the Dota2 shop with an AZERTY keyboard layout

I have an AZERTY keyboard layout. In Dota2, most hotkeys can be rebound in the in-game setting menu. However, for the shop, I have to resort to editing text files in the game folder to use AZERTY-compatible hotkeys instead of the QWERTY layout. So to buy the item on the first row and first column, I can press A& instead of Q1 and it works as intended.

Except for the 11th row (minus key on a QWERTY) which does not appear to work. So if I buy something on the 11th row, for instance a sentry ward, I cannot do it with A) (instead of Q-). However, I can buy an observer ward (10th row) with Aà (for Q0) and I can buy a bottle (12th row) with A= (for Q=).

This is an excerpt from the dotakeys_personal.lst file found in userdata:

        "ShopTabConsumables"
    {
        "Name"      "ShopTabConsumables"
        "Action"        "shop_nav_to_tab 0"
        "Key"       "a"
        "Description"       "#DOTA_Shop_Hotkey_Consumables"
        "Version"       "2"
    }
    "ShopTabAttributes"
    {
        "Name"      "ShopTabAttributes"
        "Action"        "shop_nav_to_tab 1"
        "Key"       "z"
        "Description"       "#DOTA_Shop_Hotkey_Attributes"
        "Version"       "2"
    }
    "ShopTabArmaments"
    {
        "Name"      "ShopTabArmaments"
        "Action"        "shop_nav_to_tab 2"
        "Key"       "e"
        "Description"       "#DOTA_Shop_Hotkey_Armaments"
        "Version"       "2"
    }

etc.

        "ShopSlot10"
    {
        "Name"      "ShopTabSecret"
        "Action"        "shop_select_itemrow 10"
        "Key"       "0"
        "Version"       "2"
    }
    "ShopSlot11"
    {
        "Name"      "ShopTabSecret"
        "Action"        "shop_select_itemrow 11"
        "Key"       "-"
        "Version"       "2"
    }
    "ShopSlot12"
    {
        "Name"      "ShopTabSecret"
        "Action"        "shop_select_itemrow 12"
        "Key"       "="
        "Version"       "1"
    }

What is strange is that somehow the game understands the layout of "columns" on my keyboard: after editing the text file, if I press letter A, then the game understands that I am referring to the 1st colum (A in AZERTY, Q for QWERTY).

However, when it comes to "rows", the layout is messed up: even though the text file refers to the 1st column with the key 1, if I press &, the game registers it as 1 and I get the item in the first row (exactly what I wanted). The problem really only arises with the 11th column, which is - in QWERTY and ) in AZERTY. I have tried putting ) in the text file. It does not work. I have tried putting -. It does not work.

So basically, I can buy every item except for the items on the 11th row.

If I use KP_MINUS, it works with the minus key on the keypad.