diff --git a/CHANGELOG.md b/CHANGELOG.md
index e1171d2fb..b926d2c52 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Guarded the system tags against deletion and renaming in the tag management of the admin control panel
+- Improved the language localization for Spanish (`es`)
 
 ### Fixed
 
diff --git a/apps/client/src/locales/messages.es.xlf b/apps/client/src/locales/messages.es.xlf
index ab4e4eb3e..866dac527 100644
--- a/apps/client/src/locales/messages.es.xlf
+++ b/apps/client/src/locales/messages.es.xlf
@@ -356,7 +356,7 @@
       </trans-unit>
       <trans-unit id="4467323362722952678" datatype="html">
         <source>Unknown</source>
-        <target state="new">Unknown</target>
+        <target state="translated">Desconocido</target>
         <context-group purpose="location">
           <context context-type="sourcefile">libs/ui/src/lib/i18n.ts</context>
           <context context-type="linenumber">88</context>
@@ -440,7 +440,7 @@
       </trans-unit>
       <trans-unit id="2671970132878857664" datatype="html">
         <source>Splits</source>
-        <target state="new">Splits</target>
+        <target state="translated">Desdoblamientos</target>
         <context-group purpose="location">
           <context context-type="sourcefile">apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.html</context>
           <context context-type="linenumber">512</context>
@@ -840,7 +840,7 @@
       </trans-unit>
       <trans-unit id="504959340312049745" datatype="html">
         <source>Split Ratio</source>
-        <target state="new">Split Ratio</target>
+        <target state="translated">Relación de desdoblamiento</target>
         <context-group purpose="location">
           <context context-type="sourcefile">apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.html</context>
           <context context-type="linenumber">526</context>
@@ -1776,7 +1776,7 @@
       </trans-unit>
       <trans-unit id="659291745893337969" datatype="html">
         <source>Invalid API key</source>
-        <target state="new">Invalid API key</target>
+        <target state="translated">Clave de API no válida</target>
         <context-group purpose="location">
           <context context-type="sourcefile">apps/client/src/app/components/admin-settings/admin-settings.component.html</context>
           <context context-type="linenumber">112</context>
@@ -3056,7 +3056,7 @@
       </trans-unit>
       <trans-unit id="1825717711340685842" datatype="html">
         <source>Export <x id="INTERPOLATION" equiv-text="{{ totalItems &gt; 1 ? totalItems : &apos;&apos; }}"/> <x id="ICU" equiv-text="{totalItems, plural, =1 {Activity} other {Activities}}"/></source>
-        <target state="new">Export <x id="INTERPOLATION" equiv-text="{{ totalItems &gt; 1 ? totalItems : &apos;&apos; }}"/> <x id="ICU" equiv-text="{totalItems, plural, =1 {Activity} other {Activities}}"/></target>
+        <target state="translated">Exportar <x id="INTERPOLATION" equiv-text="{{ totalItems &gt; 1 ? totalItems : &apos;&apos; }}"/> <x id="ICU" equiv-text="{totalItems, plural, =1 {Actividad} other {Actividades}}"/></target>
         <context-group purpose="location">
           <context context-type="sourcefile">libs/ui/src/lib/activities-table/activities-table.component.html</context>
           <context context-type="linenumber">68</context>
@@ -4168,7 +4168,7 @@
       </trans-unit>
       <trans-unit id="4344577155823592293" datatype="html">
         <source>Cache has been flushed.</source>
-        <target state="new">Cache has been flushed.</target>
+        <target state="translated">Caché vaciada.</target>
         <context-group purpose="location">
           <context context-type="sourcefile">apps/client/src/app/components/admin-overview/admin-overview.component.ts</context>
           <context context-type="linenumber">281</context>
@@ -4324,7 +4324,7 @@
       </trans-unit>
       <trans-unit id="6718883297275862532" datatype="html">
         <source>Shares After</source>
-        <target state="new">Shares After</target>
+        <target state="translated">Acciones después</target>
         <context-group purpose="location">
           <context context-type="sourcefile">apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.html</context>
           <context context-type="linenumber">584</context>
@@ -5292,7 +5292,7 @@
       </trans-unit>
       <trans-unit id="8993940354220895245" datatype="html">
         <source>Do you really want to delete these <x id="count" equiv-text="this.totalItems"/> activities?</source>
-        <target state="new">Do you really want to delete these <x id="count" equiv-text="this.totalItems"/> activities?</target>
+        <target state="translated">¿De verdad quieres eliminar estas <x id="count" equiv-text="this.totalItems"/> actividades?</target>
         <context-group purpose="location">
           <context context-type="sourcefile">libs/ui/src/lib/activities-table/activities-table.component.ts</context>
           <context context-type="linenumber">334</context>
@@ -5758,7 +5758,7 @@
       </trans-unit>
       <trans-unit id="3430061313424019324" datatype="html">
         <source>Data gathering has been started.</source>
-        <target state="new">Data gathering has been started.</target>
+        <target state="translated">La recopilación de datos ha comenzado.</target>
         <context-group purpose="location">
           <context context-type="sourcefile">apps/client/src/app/components/admin-market-data/admin-market-data.component.ts</context>
           <context context-type="linenumber">413</context>
@@ -7367,7 +7367,7 @@
       </trans-unit>
       <trans-unit id="4604813705660070247" datatype="html">
         <source>Shares Before</source>
-        <target state="new">Shares Before</target>
+        <target state="translated">Acciones antes</target>
         <context-group purpose="location">
           <context context-type="sourcefile">apps/client/src/app/components/admin-market-data/asset-profile-dialog/asset-profile-dialog.html</context>
           <context context-type="linenumber">597</context>
@@ -8170,7 +8170,7 @@
       </trans-unit>
       <trans-unit id="6278975207599702712" datatype="html">
         <source>{VAR_PLURAL, plural, =1 {Activity} other {Activities}}</source>
-        <target state="new">{VAR_PLURAL, plural, =1 {Activity} other {Activities}}</target>
+        <target state="translated">{VAR_PLURAL, plural, =1 {Actividad} other {Actividades}}</target>
         <context-group purpose="location">
           <context context-type="sourcefile">libs/ui/src/lib/activities-table/activities-table.component.html</context>
           <context context-type="linenumber">69</context>