[FIX] l10n_{bg,cn}: translation of CoA

Steps to reproduce:
1. Create a BG company
2. Install the BG Chart of Accounts
3. Install the BG language
4. Switch to the BG language
5. The CoA is not translated

This is due to a missing field in the CoA xml: `spoken_languages` which is now fixed.

closes odoo/odoo#107204

Signed-off-by: Laurent Smet <las@odoo.com>

addons/l10n_bg/data/account_chart_template_data.xml

@@ -8,5 +8,6 @@
         <field name="code_digits">6</field>
         <field name="currency_id" ref="base.BGN"/>
         <field name="country_id" ref="base.bg"/>
+        <field name="spoken_languages" eval="'bg_BG'"/>
     </record>
 </odoo>

addons/l10n_cn/data/l10n_cn_chart_data.xml

@@ -20,7 +20,7 @@ http://kjs.mof.gov.cn/zhengwuxinxi/zhengcefabu/201111/t20111107_605525.html
             <field name="cash_account_code_prefix">1001</field>
             <field name="bank_account_code_prefix">1002</field>
             <field name="transfer_account_code_prefix">1012</field>
-            <field name="spoken_languages" eval="'en_US'"/>
+            <field name="spoken_languages" eval="'en_US;zh_CN'"/>
             <field name="country_id" ref="base.cn"/>
         </record>
     </data>