diff --git a/Ideology/Keyed/Letters.xml b/Ideology/Keyed/Letters.xml
index 8f9e99fa..61379949 100644
--- a/Ideology/Keyed/Letters.xml
+++ b/Ideology/Keyed/Letters.xml
@@ -9,15 +9,15 @@
 
   <!-- Slave rebellion -->
   <!-- EN: Grand slave rebellion -->
-  <LetterLabelGrandSlaveRebellion>大规模奴隶起义</LetterLabelGrandSlaveRebellion>
+  <LetterLabelGrandSlaveRebellion>大规模奴隶叛乱</LetterLabelGrandSlaveRebellion>
   <!-- EN: A grand slave rebellion has begun! All of your slaves are rising up to fight back against you. They will seek weapons and try to eliminate your colonists.\n\nThese slaves are involved:\n\n{0} -->
-  <LetterGrandSlaveRebellion>一场空前的奴隶起义开始了！你所有的奴隶都一起来造反。他们会寻找武器并试图消灭你的殖民者。\n\n包含的奴隶有：\n\n{0}</LetterGrandSlaveRebellion>
+  <LetterGrandSlaveRebellion>一场空前的奴隶叛乱开始了！你所有的奴隶都一起来造反。他们会寻找武器并试图消灭你的殖民者。\n\n包含的奴隶有：\n\n{0}</LetterGrandSlaveRebellion>
   <!-- EN: Local slave rebellion -->
-  <LetterLabelLocalSlaveRebellion>部分奴隶起义</LetterLabelLocalSlaveRebellion>
+  <LetterLabelLocalSlaveRebellion>部分奴隶叛乱</LetterLabelLocalSlaveRebellion>
   <!-- EN: A local slave rebellion has begun! {0_nameDef} and some nearby slaves are rising up to fight back against you. They will seek weapons and try to eliminate your colonists.\n\nThese slaves are involved:\n\n{1} -->
-  <LetterLocalSlaveRebellion>部分奴隶起义开始了！ {0_nameDef} 和附近的一些奴隶正在造反。他们会寻找武器并试图消灭你的殖民者。\n\n包含的奴隶有：\n\n{1}</LetterLocalSlaveRebellion> 
+  <LetterLocalSlaveRebellion>部分奴隶叛乱开始了！ {0_nameDef} 和附近的一些奴隶正在造反。他们会寻找武器并试图消灭你的殖民者。\n\n包含的奴隶有：\n\n{1}</LetterLocalSlaveRebellion> 
   <!-- EN: Slave rebellion -->
-  <LetterLabelSingleSlaveRebellion>奴隶起义</LetterLabelSingleSlaveRebellion>
+  <LetterLabelSingleSlaveRebellion>奴隶叛乱</LetterLabelSingleSlaveRebellion>
   <!-- EN: {0_nameDef} is rebelling! {0_pronoun} will seek weapons and try to eliminate your colonists. -->
   <LetterSingleSlaveRebellion>{0_nameDef} 正在造反！{0_pronoun} 会寻找武器并试图消灭你的殖民者。</LetterSingleSlaveRebellion>