--- a/layout/tools/reftest/mach_commands.py
+++ b/layout/tools/reftest/mach_commands.py
@@ -224,16 +224,23 @@ class ReftestRunner(MozbuildObject):
         }
 
         if not kwargs["tests"]:
             kwargs["tests"] = [os.path.join(*default_manifest[kwargs["suite"]])]
 
         kwargs["extraProfileFiles"].append(
             os.path.join(self.topsrcdir, "mobile", "android", "fonts"))
 
+        hyphenation_path = os.path.join(self.topsrcdir, "intl", "locales")
+
+        for (dirpath, dirnames, filenames) in os.walk(hyphenation_path):
+            for filename in filenames:
+                if filename.endswith('.dic'):
+                    kwargs["extraProfileFiles"].append(os.path.join(dirpath, filename))
+
         if not kwargs["httpdPath"]:
             kwargs["httpdPath"] = os.path.join(self.tests_dir, "modules")
         if not kwargs["symbolsPath"]:
             kwargs["symbolsPath"] = os.path.join(self.topobjdir, "crashreporter-symbols")
         if not kwargs["xrePath"]:
             kwargs["xrePath"] = os.environ.get("MOZ_HOST_BIN")
         if not kwargs["app"]:
             kwargs["app"] = self.substs["ANDROID_PACKAGE_NAME"]

--- a/layout/tools/reftest/runreftest.py
+++ b/layout/tools/reftest/runreftest.py
@@ -684,22 +684,26 @@ class RefTest(object):
             )
         finally:
             self.cleanup(profileDir)
         return status
 
     def copyExtraFilesToProfile(self, options, profile):
         "Copy extra files or dirs specified on the command line to the testing profile."
         profileDir = profile.profile
+        if not os.path.exists(os.path.join(profileDir, "hyphenation")):
+            os.makedirs(os.path.join(profileDir, "hyphenation"))
         for f in options.extraProfileFiles:
             abspath = self.getFullPath(f)
             if os.path.isfile(abspath):
                 if os.path.basename(abspath) == 'user.js':
                     extra_prefs = mozprofile.Preferences.read_prefs(abspath)
                     profile.set_preferences(extra_prefs)
+                elif os.path.basename(abspath).endswith('.dic'):
+                    shutil.copy2(abspath, os.path.join(profileDir, "hyphenation"))
                 else:
                     shutil.copy2(abspath, profileDir)
             elif os.path.isdir(abspath):
                 dest = os.path.join(profileDir, os.path.basename(abspath))
                 shutil.copytree(abspath, dest)
             else:
                 self.log.warning(
                     "runreftest.py | Failed to copy %s to profile" % abspath)

--- a/testing/mozharness/configs/android/androidarm.py
+++ b/testing/mozharness/configs/android/androidarm.py
@@ -69,16 +69,17 @@ config = {
                 "--http-port=%(http_port)s",
                 "--ssl-port=%(ssl_port)s",
                 "--certificate-path=%(certs_path)s",
                 "--symbols-path=%(symbols_path)s",
                 "--quiet",
                 "--log-raw=%(raw_log_file)s",
                 "--log-errorsummary=%(error_summary_file)s",
                 "--extra-profile-file=fonts",
+                "--extra-profile-file=hyphenation",
                 "--screenshot-on-fail",
             ],
         },
         "mochitest-gl": {
             "run_filename": "runtestsremote.py",
             "testsdir": "mochitest",
             "options": [
                 "--dm_trans=sut",
@@ -159,16 +160,17 @@ config = {
                 "--devicePort=%(device_port)s",
                 "--http-port=%(http_port)s",
                 "--ssl-port=%(ssl_port)s",
                 "--httpd-path",
                 "%(modules_dir)s",
                 "--symbols-path=%(symbols_path)s",
                 "--total-chunks=16",
                 "--extra-profile-file=fonts",
+                "--extra-profile-file=hyphenation",
                 "--suite=reftest",
                 "--log-raw=%(raw_log_file)s",
                 "--log-errorsummary=%(error_summary_file)s",
             ],
             "tests": ["tests/layout/reftests/reftest.list"],
         },
         "crashtest": {
             "run_filename": "remotereftest.py",

--- a/testing/mozharness/configs/android/androidarm_4_3.py
+++ b/testing/mozharness/configs/android/androidarm_4_3.py
@@ -73,16 +73,17 @@ config = {
                 "--http-port=%(http_port)s",
                 "--ssl-port=%(ssl_port)s",
                 "--certificate-path=%(certs_path)s",
                 "--symbols-path=%(symbols_path)s",
                 "--quiet",
                 "--log-raw=%(raw_log_file)s",
                 "--log-errorsummary=%(error_summary_file)s",
                 "--extra-profile-file=fonts",
+                "--extra-profile-file=hyphenation",
                 "--screenshot-on-fail",
             ],
         },
         "mochitest-gl": {
             "run_filename": "runtestsremote.py",
             "testsdir": "mochitest",
             "options": [
                 "--dm_trans=adb",
@@ -196,16 +197,17 @@ config = {
                 "--xre-path=%(xre_path)s",
                 "--utility-path=%(utility_path)s",
                 "--http-port=%(http_port)s",
                 "--ssl-port=%(ssl_port)s",
                 "--httpd-path", "%(modules_dir)s",
                 "--symbols-path=%(symbols_path)s",
                 "--total-chunks=16",
                 "--extra-profile-file=fonts",
+                "--extra-profile-file=hyphenation",
                 "--suite=reftest",
                 "--log-raw=%(raw_log_file)s",
                 "--log-errorsummary=%(error_summary_file)s",
             ],
             "tests": ["tests/layout/reftests/reftest.list",],
         },
         "reftest-debug": {
             "run_filename": "remotereftest.py",
@@ -218,16 +220,17 @@ config = {
                 "--xre-path=%(xre_path)s",
                 "--utility-path=%(utility_path)s",
                 "--http-port=%(http_port)s",
                 "--ssl-port=%(ssl_port)s",
                 "--httpd-path", "%(modules_dir)s",
                 "--symbols-path=%(symbols_path)s",
                 "--total-chunks=48",
                 "--extra-profile-file=fonts",
+                "--extra-profile-file=hyphenation",
                 "tests/layout/reftests/reftest.list",
             ],
         },
         "crashtest": {
             "run_filename": "remotereftest.py",
             "testsdir": "reftest",
             "options": [
                 "--app=%(app)s",