diff --git a/subiquity/server/controllers/filesystem.py b/subiquity/server/controllers/filesystem.py
index 0113f45d..9c361ed2 100644
--- a/subiquity/server/controllers/filesystem.py
+++ b/subiquity/server/controllers/filesystem.py
@@ -96,20 +96,21 @@ log = logging.getLogger("subiquity.server.controllers.filesystem")
 block_discover_log = logging.getLogger('block-discover')
 
 
-system_defective_encryption_text = _("""
-The model being installed requires TPM-backed encryption but this
-system does not support it (the reason given was "{unavailable_reason}").
-""")
+# for translators: 'reason' is the reason FDE is unavailable.
+system_defective_encryption_text = _(
+    "TPM backed full-disk encryption is not available "
+    "on this device (the reason given was \"{reason}\")."
+)
 
-system_multiple_volumes_text = _("""
-The model being installed defines multiple volumes, which is not currently
-supported.
-""")
+system_multiple_volumes_text = _(
+    "TPM backed full-disk encryption is not yet supported when "
+    "the target spans multiple volumes."
+)
 
-system_non_gpt_text = _("""
-The model being installed defines a volume with a partition table type other
-than GPT, which is not currently supported.
-""")
+system_non_gpt_text = _(
+    "TPM backed full-disk encryption is only supported with a target volume "
+    "partition table of GPT."
+)
 
 
 class NoSnapdSystemsOnSource(Exception):
@@ -218,7 +219,7 @@ class FilesystemController(SubiquityController, FilesystemManipulator):
         if se.support == StorageEncryptionSupport.DEFECTIVE:
             self._core_boot_classic_error = \
               system_defective_encryption_text.format(
-                  unavailable_reason=se.unavailable_reason)
+                  reason=se.unavailable_reason)
         if se.support == StorageEncryptionSupport.UNAVAILABLE:
             log.debug(
                 "storage encryption unavailable: %r", se.unavailable_reason)
diff --git a/subiquity/ui/views/filesystem/guided.py b/subiquity/ui/views/filesystem/guided.py
index 817a44ad..3609c236 100644
--- a/subiquity/ui/views/filesystem/guided.py
+++ b/subiquity/ui/views/filesystem/guided.py
@@ -129,41 +129,45 @@ class TPMChoice:
     help: str
 
 
+tpm_help_texts = {
+    "DISABLED":
+        _("TPM backed full-disk encryption has been disabled."),
+    "AVAILABLE_CAN_BE_DESELECTED":
+        _("The entire disk will be encrypted and protected by the "
+          "TPM. If this option is deselected, the disk will be "
+          "unencrypted and without any protection."),
+    "AVAILABLE_CANNOT_BE_DESELECTED":
+        _("The entire disk will be encrypted and protected by the TPM."),
+    "UNAVAILABLE":
+        # for translators: 'reason' is the reason FDE is unavailable.
+        _("TPM backed full-disk encryption is not available "
+          "on this device (the reason given was \"{reason}\")."),
+}
+
 choices = {
     StorageEncryptionSupport.DISABLED: {
         safety: TPMChoice(
             enabled=False, default=False,
-            help=_("The model being installed does not support TPM backed "
-                   "full-disk encryption")) for safety in StorageSafety
-            },
+            help=tpm_help_texts['DISABLED'])
+        for safety in StorageSafety
+        },
     StorageEncryptionSupport.AVAILABLE: {
         StorageSafety.ENCRYPTED: TPMChoice(
             enabled=False, default=True,
-            help=_("The model being installed requires TPM backed full-disk "
-                   "encryption")),
+            help=tpm_help_texts['AVAILABLE_CANNOT_BE_DESELECTED']),
         StorageSafety.PREFER_ENCRYPTED: TPMChoice(
             enabled=True, default=True,
-            help=_("The entire disk will be encrypted and protected by the "
-                   "TPM. If this option is deselected, the disk will be "
-                   "unencrypted and without any protection.")),
+            help=tpm_help_texts['AVAILABLE_CAN_BE_DESELECTED']),
         StorageSafety.PREFER_UNENCRYPTED: TPMChoice(
             enabled=True, default=False,
-            help=_("The model being installed does not prefer but allows TPM "
-                   "backed full-disk encryption")),
-            },
+            help=tpm_help_texts['AVAILABLE_CAN_BE_DESELECTED']),
+        },
     StorageEncryptionSupport.UNAVAILABLE: {
-        StorageSafety.PREFER_ENCRYPTED: TPMChoice(
+        safety: TPMChoice(
             enabled=False, default=False,
-            help=_("The model being installed prefers but does not require "
-                   "TPM backed full-disk encryption and it is not available "
-                   "on this device (the reason given was \"{reason}\").")),
-        StorageSafety.PREFER_UNENCRYPTED: TPMChoice(
-            enabled=False, default=False,
-            # for translators: 'reason' is the reason FDE is unavailable.
-            help=_("The model being installed does not prefer TPM backed "
-                   "full-disk encryption and it is not available on this "
-                   "device (the reason given was \"{reason}\").")),
-            },
+            help=tpm_help_texts['UNAVAILABLE'])
+        for safety in StorageSafety
+        },
     # StorageEncryptionSupport.DEFECTIVE: handled in controller code
 }