diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1223e8bb8..f465df120 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 - Updated portuguese translations
 - Added automatic RuboCop validation on pre-commit
 - Use union type instead of enum for SettingName
+- Clarified documentation about default values for environment variables
 - Fix a bug: wrong variable reference in `SingleSignOnConcern:Merge_form_sso`
 - Fix a bug: wrong focus behavior on text editor
 - Fix a bug: trainings monitoring is not available
diff --git a/doc/environment.md b/doc/environment.md
index 9d9f69166..47b9dffcc 100644
--- a/doc/environment.md
+++ b/doc/environment.md
@@ -192,7 +192,7 @@ _Eg.: configuring **es-ES** will set the currency symbol to **€** but **es-MX*
 
 Available values: `en, en-AU-CA, en-GB, en-IE, en-IN, en-NZ, en-US, en-ZA, fr, fa-CA, fr-CH, fr-CM, fr-FR, es, es-419, es-AR, es-CL, es-CO, es-CR, es-DO,
   es-EC, es-ES, es-MX, es-MX, es-PA, es-PE, es-US, es-VE, no, pt, pt-BR, zu`.
-Default is **en**.
+When not defined, it defaults to **en**.
 
 If your locale is not present in that list or any locale doesn't have your exact expectations, please open a pull request to share your modifications with the community and obtain a rebuilt docker image.
 You can find templates of these files at https://github.com/svenfuchs/rails-i18n/tree/rails-5-x/rails/locale.
@@ -203,7 +203,7 @@ You can find templates of these files at https://github.com/svenfuchs/rails-i18n
 Configure the moment.js library for l10n.
 
 See [github.com/moment/momentlocale/*.js](https://github.com/moment/moment/tree/2.22.2/locale) for a list of available locales.
-Default is **en** (even if it's not listed).
+When not defined, it defaults to **en** (even if it's not listed).
 <a name="SUMMERNOTE_LOCALE"></a>
 
     SUMMERNOTE_LOCALE
@@ -211,7 +211,7 @@ Default is **en** (even if it's not listed).
 Configure the javascript summernote editor for l10n.
 
 See [github.com/summernote/summernote/lang/summernote-*.js](https://github.com/summernote/summernote/tree/v0.8.18/lang) for a list of available locales.
-Default is **en-US** (even if it's not listed).
+When not defined, it defaults to **en-US** (even if it's not listed).
 <a name="ANGULAR_LOCALE"></a>
 
     ANGULAR_LOCALE
@@ -222,14 +222,14 @@ Please, be aware that **the configured locale will imply the CURRENCY displayed
 
 _Eg.: configuring **fr-fr** will set the currency symbol to **€** but **fr-ca** will set **$** as currency symbol, so setting the `ANGULAR_LOCALE` to simple **fr** (without country indication) will probably not do what you expect._
 
-See [code.angularjs.org/i18n/angular-locale_*.js](https://code.angularjs.org/1.8.2/i18n/) for a list of available locales. Default is **en**.
+See [code.angularjs.org/i18n/angular-locale_*.js](https://code.angularjs.org/1.8.2/i18n/) for a list of available locales. When not defined, it defaults to **en**.
 <a name="FULLCALENDAR_LOCALE"></a>
 
     FULLCALENDAR_LOCALE
 
 Configure the fullCalendar JS agenda library.
 
-See [github.com/fullcalendar/fullcalendar/locale/*.js](https://github.com/fullcalendar/fullcalendar/tree/v3.10.2/locale) for a list of available locales. Default is **en**.
+See [github.com/fullcalendar/fullcalendar/locale/*.js](https://github.com/fullcalendar/fullcalendar/tree/v3.10.2/locale) for a list of available locales. When not defined, it defaults to **en**.
 <a name="INTL_LOCALE"></a>
 
     INTL_LOCALE
@@ -256,7 +256,7 @@ Available values: `danish, dutch, english, finnish, french, german, hungarian, i
     TIME_ZONE
 
 In Rails: set Time.zone default to the specified zone and make Active Record auto-convert to this zone. Run `rails time:zones:all` for a list of available time zone names.
-Default is **UTC**.
+When not defined, it defaults to **UTC**.
 <a name="WEEK_STARTING_DAY"></a>
 
     WEEK_STARTING_DAY