Summary:

Up until Sage CRM 7.3 SP3, a number of button IDs within the product were localised. This had the effect of different HTML ID attribute values being returned depending on which user language was selected.

In the 7.3 SP3 release, a large proportion of these IDs have been identified and fixed. This may have an impact on customisations that make use of these IDs. Client-side customisations making use of these button IDs should be tested before being placed into production.
 

More information: 

In Sage CRM 7.3 SP3, the following button IDs are de-localised.

My CRM | Groups | <Group> | Send to MailChimp
My CRM | Preferences | About CRM
My CRM | Preferences | Install Classic Outlook Integration
My CRM | Preferences | Install Lite Outlook Integration
My CRM | Preferences | Change Password
Marketing | Campaign List | <Campaign> | <Internal Mail Merge wave item> | Create New Group
Marketing | E-marketing responses | Create group based on responses
Quotes and Orders | New Free Text item | Save & New
Quotes and Orders | New line item | Cancel
Quotes and Orders | New line item | Check Price
Quotes and Orders | New line item | Save & New
Quotes and Orders | Save and Promote to ERP

Classic Outlook integration | File and View E-mail
Classic Outlook integration | File and View Communication List
Lite Outlook integration | File E-mail screen | Save
Lite Outlook integration | File E-mail screen | CAncel

Administration | Advanced Customisation | Devices | New Device
Administration | Advanced Customisation | Devices | View unassigned user agents
Administration | Integration | Integration List | <integration> | Immediate Sync
Administration | System | Timings | Busines Calendar | New
Administration | System | Timings | Holiday Set | New
Administration | System | Timings | Holiday Set | <Select a holiday set> | Clone
Administration | Users | Security | User Direct Rights | Add user
Administration | Users | Security | Edit Territory
Administration | Users | Security | Merge Territory
Administration | Users | Security | Move Territory
Administration | Users | Security | New Territory
Administration | Users | Security | Rebalance
Administration | Users | Secuirty | Security Profiles | <Select a profile> | Add territory to profile
Administration | Users | Secuirty | Security Profiles | <Select a profile> | Move user into this profile
Administration | Users | Security | Security Profiles | <Select Assigned To> | Add Profile to this territory
Administration | Users | Teams | <Team> | Move User to Team
Administration | Data Management | Data Upload | <Carry out upload, creating a group> | Groups