KMouth is a program which enables persons that cannot speak to let their computer speak, e.g. mute people or people who have lost their voice. It has a text input field and speaks the sentences that you enter. It also has support for user defined phrasebooks.
The packages for RHEL 8 and RHEL 7 are in each distribution’s respective Extra Packages for Enterprise Linux (EPEL) repository. The instructions for adding this repository diverge slightly between RHEL 8 and RHEL 7, which is why they’re listed separately below.
The EPEL repository can be added to RHEL 8 with the following command: