How to add new translations to child theme?

How we can add new words and create translations for child theme?

You can follow these steps:

• Create child theme and copy your file (with my example it is header.php) to child theme
• Inside header.php file (change to your file) I added new string to 98 line:  <h3>{__ ‘my new string’}</h3>
• Created new directory2-child.pot file inside wp-content/themes/directory2-child/ait-theme/languages/directory2-child.pot
  

  # Copyright (C) 2017 AitThemes.club
  # This file is distributed under the GNU General Public License.
  
  msgid ""
  
  msgstr ""
  "Project-Id-Version: Directory+\n"
  "Report-Msgid-Bugs-To: https://system.ait-themes.club/support/\n"
  "POT-Creation-Date: 2017-01-12 14:04:47+00:00\n"
  "MIME-Version: 1.0\n"
  "Content-Type: text/plain; charset=UTF-8\n"
  "Content-Transfer-Encoding: 8bit\n"
  "PO-Revision-Date: 2017-MO-DA HO:MI+ZONE\n"
  
  "Language-Team: LANGUAGE <LL@li.org>\n"
  
  #: /header.php:98
  
  msgid "my new string"
  
  msgstr ""

• With poedit editor I generated wp-content/themes/directory2-child/ait-theme/languages/en_US.po
  and wp-content/themes/directory2-child/ait-theme/languages/en_US.mo
  

  # Copyright (C) 2017 AitThemes.club
  # This file is distributed under the GNU General Public License.
  
  msgid ""
  
  msgstr ""
  "Project-Id-Version: Directory+\n"
  "Report-Msgid-Bugs-To: https://system.ait-themes.club/support/\n"
  "POT-Creation-Date: 2017-03-01 17:04+0100\n"
  "MIME-Version: 1.0\n"
  "Content-Type: text/plain; charset=UTF-8\n"
  "Content-Transfer-Encoding: 8bit\n"
  "PO-Revision-Date: 2017-03-01 17:05+0100\n"
  "Language-Team: \n"
  "X-Generator: Poedit 1.8.3\n"
  "Last-Translator: \n"
  "Plural-Forms: nplurals=2; plural=(n != 1);\n"
  "Language: en_US\n"
  
  #: /header.php:98
  
  msgid "my new string"
  
  msgstr "How are you"

• Also I generated other languages
• With ait-languages plugin I have created en_US language and also de_DE
  If directory+ was loaded in header appeared my new strings.