fix(server): properly localize timedelta string

Fixes #248

server/core/models.py

@@ -7,8 +7,12 @@
 from django.urls import reverse
 from datetime import date
 
+from django.utils.translation import get_language, to_locale
+
 from .utils import is_version_in_target_versions
 
+LOCALE_MAPPING = {"en": "en_US", "ko": "ko_KR"}
+
 
 # Device Model
 class Device(models.Model):
@@ -366,6 +370,12 @@ def get_absolute_url(self):
         )
 
     def human_readable_timedelta(self):
+        locale = LOCALE_MAPPING[get_language()]
+        if locale != "en_US":
+            try:
+                humanize.i18n.activate(locale=locale)
+            except FileNotFoundError:
+                pass
         return humanize.naturaltime(date.today() - self.build_date)