diff --git a/diff.c b/diff.c
index 5f497fac52..097eb4c47a 100644
--- a/diff.c
+++ b/diff.c
@@ -101,12 +101,12 @@ static int parse_dirstat_params(struct diff_options *options, const char *params
 			if (end - p == p_len)
 				options->dirstat_permille = permille;
 			else {
-				strbuf_addf(errmsg, "  Failed to parse dirstat cut-off percentage '%.*s'\n",
+				strbuf_addf(errmsg, _("  Failed to parse dirstat cut-off percentage '%.*s'\n"),
 					    p_len, p);
 				ret++;
 			}
 		} else {
-			strbuf_addf(errmsg, "  Unknown dirstat parameter '%.*s'\n",
+			strbuf_addf(errmsg, _("  Unknown dirstat parameter '%.*s'\n"),
 				    p_len, p);
 			ret++;
 		}
@@ -202,7 +202,7 @@ int git_diff_basic_config(const char *var, const char *value, void *cb)
 		struct strbuf errmsg = STRBUF_INIT;
 		default_diff_options.dirstat_permille = diff_dirstat_permille_default;
 		if (parse_dirstat_params(&default_diff_options, value, &errmsg))
-			warning("Found errors in 'diff.dirstat' config variable:\n%s",
+			warning(_("Found errors in 'diff.dirstat' config variable:\n%s"),
 				errmsg.buf);
 		strbuf_release(&errmsg);
 		diff_dirstat_permille_default = default_diff_options.dirstat_permille;
@@ -3260,7 +3260,7 @@ static int parse_dirstat_opt(struct diff_options *options, const char *params)
 {
 	struct strbuf errmsg = STRBUF_INIT;
 	if (parse_dirstat_params(options, params, &errmsg))
-		die("Failed to parse --dirstat/-X option parameter:\n%s",
+		die(_("Failed to parse --dirstat/-X option parameter:\n%s"),
 		    errmsg.buf);
 	strbuf_release(&errmsg);
 	/*
diff --git a/t/t4047-diff-dirstat.sh b/t/t4047-diff-dirstat.sh
index cc947fde91..29e80a58cd 100755
--- a/t/t4047-diff-dirstat.sh
+++ b/t/t4047-diff-dirstat.sh
@@ -943,37 +943,37 @@ test_expect_success '--dirstat=future_param,lines,0 should fail loudly' '
 	test_must_fail git diff --dirstat=future_param,lines,0 HEAD^..HEAD >actual_diff_dirstat 2>actual_error &&
 	test_debug "cat actual_error" &&
 	test_cmp /dev/null actual_diff_dirstat &&
-	grep -q "future_param" actual_error &&
-	grep -q "\--dirstat" actual_error
+	test_i18ngrep -q "future_param" actual_error &&
+	test_i18ngrep -q "\--dirstat" actual_error
 '
 
 test_expect_success '--dirstat=dummy1,cumulative,2dummy should report both unrecognized parameters' '
 	test_must_fail git diff --dirstat=dummy1,cumulative,2dummy HEAD^..HEAD >actual_diff_dirstat 2>actual_error &&
 	test_debug "cat actual_error" &&
 	test_cmp /dev/null actual_diff_dirstat &&
-	grep -q "dummy1" actual_error &&
-	grep -q "2dummy" actual_error &&
-	grep -q "\--dirstat" actual_error
+	test_i18ngrep -q "dummy1" actual_error &&
+	test_i18ngrep -q "2dummy" actual_error &&
+	test_i18ngrep -q "\--dirstat" actual_error
 '
 
 test_expect_success 'diff.dirstat=future_param,0,lines should warn, but still work' '
 	git -c diff.dirstat=future_param,0,lines diff --dirstat HEAD^..HEAD >actual_diff_dirstat 2>actual_error &&
 	test_debug "cat actual_error" &&
 	test_cmp expect_diff_dirstat actual_diff_dirstat &&
-	grep -q "future_param" actual_error &&
-	grep -q "diff\\.dirstat" actual_error &&
+	test_i18ngrep -q "future_param" actual_error &&
+	test_i18ngrep -q "diff\\.dirstat" actual_error &&
 
 	git -c diff.dirstat=future_param,0,lines diff --dirstat -M HEAD^..HEAD >actual_diff_dirstat_M 2>actual_error &&
 	test_debug "cat actual_error" &&
 	test_cmp expect_diff_dirstat_M actual_diff_dirstat_M &&
-	grep -q "future_param" actual_error &&
-	grep -q "diff\\.dirstat" actual_error &&
+	test_i18ngrep -q "future_param" actual_error &&
+	test_i18ngrep -q "diff\\.dirstat" actual_error &&
 
 	git -c diff.dirstat=future_param,0,lines diff --dirstat -C -C HEAD^..HEAD >actual_diff_dirstat_CC 2>actual_error &&
 	test_debug "cat actual_error" &&
 	test_cmp expect_diff_dirstat_CC actual_diff_dirstat_CC &&
-	grep -q "future_param" actual_error &&
-	grep -q "diff\\.dirstat" actual_error
+	test_i18ngrep -q "future_param" actual_error &&
+	test_i18ngrep -q "diff\\.dirstat" actual_error
 '
 
 test_done