AbpDictionaryBasedStringLocalizer should use base cultures for getting all strings too.

src/Volo.Abp.Localization/Volo/Abp/Localization/AbpDictionaryBasedStringLocalizer.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Globalization;
+using System.Linq;
 using Microsoft.Extensions.Localization;
 
 namespace Volo.Abp.Localization
@@ -125,9 +126,16 @@ namespace Volo.Abp.Localization
 
             var dictionaries = Resource.DictionaryProvider.Dictionaries;
 
-            //Create a temp dictionary to build
             var allStrings = new Dictionary<string, LocalizedString>();
 
+            foreach (var baseLocalizer in BaseLocalizers.Select(l => l.WithCulture(CultureInfo.GetCultureInfo(cultureName))))
+            {
+                foreach (var localizedString in baseLocalizer.GetAllStrings(includeParentCultures))
+                {
+                    allStrings[localizedString.Name] = localizedString;
+                }
+            }
+
             if (includeParentCultures)
             {
                 //Fill all strings from default dictionary

test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/AbpLocalization_Tests.cs

@@ -75,6 +75,8 @@ namespace Volo.Abp.Localization
             {
                 _localizer["USA"].Value.ShouldBe("United States of America"); //Inherited from CountryNames/en.json
                 _localizer["ThisFieldIsRequired"].Value.ShouldBe("This field is required"); //Inherited from Validation/en.json
+
+                _localizer.GetAllStrings().ShouldContain(ls => ls.Name == "USA");
             }
 
             using (AbpCultureHelper.Use("tr"))