diff --git a/src/sakia/core/money/quant_zerosum.py b/src/sakia/core/money/quant_zerosum.py
index e023c4c2afee2ef29e4a44ac98d07050a90f8cc8..767257c85d1142fb3d510e881d06b8de897150ba 100644
--- a/src/sakia/core/money/quant_zerosum.py
+++ b/src/sakia/core/money/quant_zerosum.py
@@ -47,7 +47,7 @@ class QuantitativeZSum(BaseReferential):
 
     @property
     def diff_units(self):
-        return self.units
+        return QCoreApplication.translate("Quantitative", Quantitative._UNITS_STR_).format(self.community.short_currency)
 
     async def value(self):
         """
diff --git a/src/sakia/core/money/relative_zerosum.py b/src/sakia/core/money/relative_zerosum.py
index 5837cac2c0531df0c040846d1a4f4e8c421dcf87..fce8593b1e72e1766e6ced87910b89eae5a55d1b 100644
--- a/src/sakia/core/money/relative_zerosum.py
+++ b/src/sakia/core/money/relative_zerosum.py
@@ -46,7 +46,7 @@ class RelativeZSum(BaseReferential):
 
     @property
     def diff_units(self):
-        return Relative.units
+        return QCoreApplication.translate("Relative", Relative._UNITS_STR_).format(self.community.short_currency)
 
     async def value(self):
         """